21996202535 has 4 divisors (see below), whose sum is σ = 26395443048. Its totient is φ = 17596962024.

The previous prime is 21996202447. The next prime is 21996202541. The reversal of 21996202535 is 53520269912.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21996202535 - 2⁸ = 21996202279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2199620249 + ... + 2199620258.

It is an arithmetic number, because the mean of its divisors is an integer number (6598860762).

Almost surely, 2^21996202535 is an apocalyptic number.

21996202535 is a deficient number, since it is larger than the sum of its proper divisors (4399240513).

21996202535 is an equidigital number, since it uses as much as digits as its factorization.

21996202535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4399240512.

The product of its (nonzero) digits is 291600, while the sum is 44.

The spelling of 21996202535 in words is "twenty-one billion, nine hundred ninety-six million, two hundred two thousand, five hundred thirty-five".