20122453 has 4 divisors (see below), whose sum is σ = 21670348. Its totient is φ = 18574560.

The previous prime is 20122429. The next prime is 20122469. The reversal of 20122453 is 35422102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35422102 = 2 ⋅17711051.

It can be written as a sum of positive squares in 2 ways, for example, as 964324 + 19158129 = 982^2 + 4377^2 .

It is a cyclic number.

It is not a de Polignac number, because 20122453 - 2¹⁷ = 19991381 is a prime.

It is a super-2 number, since 2×20122453² = 809826229474418, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20122453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 773928 + ... + 773953.

It is an arithmetic number, because the mean of its divisors is an integer number (5417587).

Almost surely, 2^20122453 is an apocalyptic number.

It is an amenable number.

20122453 is a deficient number, since it is larger than the sum of its proper divisors (1547895).

20122453 is a wasteful number, since it uses less digits than its factorization.

20122453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1547894.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20122453 is about 4485.8057247277. The cubic root of 20122453 is about 271.9946158464.

Adding to 20122453 its reverse (35422102), we get a palindrome (55544555).

It can be divided in two parts, 2012 and 2453, that added together give a triangular number (4465 = T₉₄).

The spelling of 20122453 in words is "twenty million, one hundred twenty-two thousand, four hundred fifty-three".