20213431002 has 48 divisors (see below), whose sum is σ = 45000544680. Its totient is φ = 6552631296.

The previous prime is 20213430997. The next prime is 20213431019. The reversal of 20213431002 is 20013431202.

20213431002 is a `hidden beast` number, since 20 + 213 + 431 + 0 + 0 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 20073505761 + 139925241 = 141681^2 + 11829^2 .

It is a super-2 number, since 2×20213431002² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1731778 + ... + 1743410.

Almost surely, 2^20213431002 is an apocalyptic number.

20213431002 is an abundant number, since it is smaller than the sum of its proper divisors (24787113678).

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

20213431002 is a wasteful number, since it uses less digits than its factorization.

20213431002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14287 (or 14284 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20213431002 its reverse (20013431202), we get a palindrome (40226862204).

The spelling of 20213431002 in words is "twenty billion, two hundred thirteen million, four hundred thirty-one thousand, two".