20811101802 has 16 divisors (see below), whose sum is σ = 41646750912. Its totient is φ = 6932942720.

The previous prime is 20811101797. The next prime is 20811101827. The reversal of 20811101802 is 20810111802.

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, 1011774 + ... + 1032137.

It is an arithmetic number, because the mean of its divisors is an integer number (2602921932).

Almost surely, 2^20811101802 is an apocalyptic number.

20811101802 is an abundant number, since it is smaller than the sum of its proper divisors (20835649110).

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

20811101802 is a wasteful number, since it uses less digits than its factorization.

20811101802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2045613.

The product of its (nonzero) digits is 256, while the sum is 24.

The spelling of 20811101802 in words is "twenty billion, eight hundred eleven million, one hundred one thousand, eight hundred two".