21163916402 has 8 divisors (see below), whose sum is σ = 31747091376. Its totient is φ = 10581552612.

The previous prime is 21163916401. The next prime is 21163916407. The reversal of 21163916402 is 20461936112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21163916402² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21163916401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132728 + ... + 244835.

It is an arithmetic number, because the mean of its divisors is an integer number (3968386422).

Almost surely, 2^21163916402 is an apocalyptic number.

21163916402 is a deficient number, since it is larger than the sum of its proper divisors (10583174974).

21163916402 is a wasteful number, since it uses less digits than its factorization.

21163916402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405592.

The product of its (nonzero) digits is 15552, while the sum is 35.

The spelling of 21163916402 in words is "twenty-one billion, one hundred sixty-three million, nine hundred sixteen thousand, four hundred two".