21032402402 has 32 divisors (see below), whose sum is σ = 35001224064. Its totient is φ = 9397987200.

The previous prime is 21032402399. The next prime is 21032402407. The reversal of 21032402402 is 20420423012.

It is not an unprimeable number, because it can be changed into a prime (21032402407) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3079163 + ... + 3085985.

It is an arithmetic number, because the mean of its divisors is an integer number (1093788252).

Almost surely, 2^21032402402 is an apocalyptic number.

21032402402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21032402402 is a deficient number, since it is larger than the sum of its proper divisors (13968821662).

21032402402 is a wasteful number, since it uses less digits than its factorization.

21032402402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9194.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 21032402402 its reverse (20420423012), we get a palindrome (41452825414).

The spelling of 21032402402 in words is "twenty-one billion, thirty-two million, four hundred two thousand, four hundred two".