20813802 has 16 divisors (see below), whose sum is σ = 41702880. Its totient is φ = 6925392.

The previous prime is 20813791. The next prime is 20813813. The reversal of 20813802 is 20831802.

It is an interprime number because it is at equal distance from previous prime (20813791) and next prime (20813813).

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, 849 + ... + 6507.

It is an arithmetic number, because the mean of its divisors is an integer number (2606430).

Almost surely, 2^20813802 is an apocalyptic number.

20813802 is an abundant number, since it is smaller than the sum of its proper divisors (20889078).

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

20813802 is a wasteful number, since it uses less digits than its factorization.

20813802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6277.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 20813802 is about 4562.2145938130. The cubic root of 20813802 is about 275.0745891335.

The spelling of 20813802 in words is "twenty million, eight hundred thirteen thousand, eight hundred two".