20215211874 has 64 divisors (see below), whose sum is σ = 48167820288. Its totient is φ = 5574945600.

The previous prime is 20215211869. The next prime is 20215211963. The reversal of 20215211874 is 47811251202.

It is a super-2 number, since 2×20215211874² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105004 + ... + 226839.

It is an arithmetic number, because the mean of its divisors is an integer number (752622192).

Almost surely, 2^20215211874 is an apocalyptic number.

20215211874 is an abundant number, since it is smaller than the sum of its proper divisors (27952608414).

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

20215211874 is a wasteful number, since it uses less digits than its factorization.

20215211874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331943.

The product of its (nonzero) digits is 8960, while the sum is 33.

The spelling of 20215211874 in words is "twenty billion, two hundred fifteen million, two hundred eleven thousand, eight hundred seventy-four".