20497626 has 12 divisors (see below), whose sum is σ = 44411562. Its totient is φ = 6832536.

The previous prime is 20497621. The next prime is 20497639. The reversal of 20497626 is 62679402.

It is a happy number.

20497626 is a `hidden beast` number, since 20 + 4 + 9 + 7 + 626 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11189025 + 9308601 = 3345^2 + 3051^2 .

It is not an unprimeable number, because it can be changed into a prime (20497621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 569361 + ... + 569396.

Almost surely, 2^20497626 is an apocalyptic number.

20497626 is an abundant number, since it is smaller than the sum of its proper divisors (23913936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20497626 is a wasteful number, since it uses less digits than its factorization.

20497626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138765 (or 1138762 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 20497626 is about 4527.4303970354. The cubic root of 20497626 is about 273.6746186390.

The spelling of 20497626 in words is "twenty million, four hundred ninety-seven thousand, six hundred twenty-six".