20451022 has 8 divisors (see below), whose sum is σ = 30854376. Its totient is φ = 10166232.

The previous prime is 20451007. The next prime is 20451029. The reversal of 20451022 is 22015402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20450987 and 20451005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20451029) 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, 29208 + ... + 29899.

It is an arithmetic number, because the mean of its divisors is an integer number (3856797).

Almost surely, 2^20451022 is an apocalyptic number.

20451022 is a deficient number, since it is larger than the sum of its proper divisors (10403354).

20451022 is a wasteful number, since it uses less digits than its factorization.

20451022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59282.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 20451022 is about 4522.2806193336. The cubic root of 20451022 is about 273.4670497175.

Adding to 20451022 its reverse (22015402), we get a palindrome (42466424).

It can be divided in two parts, 2045 and 1022, that multiplied together give a triangular number (2089990 = T₂₀₄₄).

The spelling of 20451022 in words is "twenty million, four hundred fifty-one thousand, twenty-two".