20868474 has 16 divisors (see below), whose sum is σ = 45531360. Its totient is φ = 6323760.

The previous prime is 20868473. The next prime is 20868499. The reversal of 20868474 is 47486802.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20868473) 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, 158029 + ... + 158160.

It is an arithmetic number, because the mean of its divisors is an integer number (2845710).

Almost surely, 2^20868474 is an apocalyptic number.

20868474 is an abundant number, since it is smaller than the sum of its proper divisors (24662886).

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

20868474 is a wasteful number, since it uses less digits than its factorization.

20868474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316205.

The product of its (nonzero) digits is 86016, while the sum is 39.

The square root of 20868474 is about 4568.2024911337. The cubic root of 20868474 is about 275.3152264037.

The spelling of 20868474 in words is "twenty million, eight hundred sixty-eight thousand, four hundred seventy-four".