20213331402 has 16 divisors (see below), whose sum is σ = 44101814112. Its totient is φ = 6125251920.

The previous prime is 20213331377. The next prime is 20213331421. The reversal of 20213331402 is 20413331202.

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, 153131233 + ... + 153131364.

It is an arithmetic number, because the mean of its divisors is an integer number (2756363382).

Almost surely, 2^20213331402 is an apocalyptic number.

20213331402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20213331402 is an abundant number, since it is smaller than the sum of its proper divisors (23888482710).

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

20213331402 is a wasteful number, since it uses less digits than its factorization.

20213331402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306262613.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 20213331402 its reverse (20413331202), we get a palindrome (40626662604).

The spelling of 20213331402 in words is "twenty billion, two hundred thirteen million, three hundred thirty-one thousand, four hundred two".