21113433402 has 32 divisors (see below), whose sum is σ = 42452579520. Its totient is φ = 7000256640.

The previous prime is 21113433401. The next prime is 21113433409. The reversal of 21113433402 is 20433431112.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21113433401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1417152 + ... + 1431972.

It is an arithmetic number, because the mean of its divisors is an integer number (1326643110).

Almost surely, 2^21113433402 is an apocalyptic number.

21113433402 is an abundant number, since it is smaller than the sum of its proper divisors (21339146118).

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

21113433402 is a wasteful number, since it uses less digits than its factorization.

21113433402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16078.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21113433402 its reverse (20433431112), we get a palindrome (41546864514).

The spelling of 21113433402 in words is "twenty-one billion, one hundred thirteen million, four hundred thirty-three thousand, four hundred two".