20908474 has 16 divisors (see below), whose sum is σ = 33105600. Its totient is φ = 9876384.

The previous prime is 20908471. The next prime is 20908501. The reversal of 20908474 is 47480902.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20908471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21139 + ... + 22105.

It is an arithmetic number, because the mean of its divisors is an integer number (2069100).

Almost surely, 2^20908474 is an apocalyptic number.

20908474 is a deficient number, since it is larger than the sum of its proper divisors (12197126).

20908474 is a wasteful number, since it uses less digits than its factorization.

20908474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 20908474 is about 4572.5784848376. The cubic root of 20908474 is about 275.4910191703.

The spelling of 20908474 in words is "twenty million, nine hundred eight thousand, four hundred seventy-four".