20624434 has 16 divisors (see below), whose sum is σ = 33520608. Its totient is φ = 9479232.

The previous prime is 20624381. The next prime is 20624447. The reversal of 20624434 is 43442602.

It is a junction number, because it is equal to n+sod(n) for n = 20624399 and 20624408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5592 + ... + 8515.

It is an arithmetic number, because the mean of its divisors is an integer number (2095038).

Almost surely, 2^20624434 is an apocalyptic number.

20624434 is a deficient number, since it is larger than the sum of its proper divisors (12896174).

20624434 is a wasteful number, since it uses less digits than its factorization.

20624434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14169.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 20624434 is about 4541.4132161696. The cubic root of 20624434 is about 274.2378189922.

The spelling of 20624434 in words is "twenty million, six hundred twenty-four thousand, four hundred thirty-four".