20454245 has 16 divisors (see below), whose sum is σ = 29272320. Its totient is φ = 13415424.

The previous prime is 20454233. The next prime is 20454257. The reversal of 20454245 is 54245402.

It is an interprime number because it is at equal distance from previous prime (20454233) and next prime (20454257).

It is a cyclic number.

It is not a de Polignac number, because 20454245 - 2¹² = 20450149 is a prime.

It is a super-2 number, since 2×20454245² = 836752277040050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11900 + ... + 13509.

It is an arithmetic number, because the mean of its divisors is an integer number (1829520).

Almost surely, 2^20454245 is an apocalyptic number.

It is an amenable number.

20454245 is a deficient number, since it is larger than the sum of its proper divisors (8818075).

20454245 is a wasteful number, since it uses less digits than its factorization.

20454245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25444.

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 20454245 is about 4522.6369520447. The cubic root of 20454245 is about 273.4814147373.

Adding to 20454245 its reverse (54245402), we get a palindrome (74699647).

The spelling of 20454245 in words is "twenty million, four hundred fifty-four thousand, two hundred forty-five".