21952753836 has 48 divisors (see below), whose sum is σ = 55940306688. Its totient is φ = 6659553600.

The previous prime is 21952753831. The next prime is 21952753841. The reversal of 21952753836 is 63835725912.

It is an interprime number because it is at equal distance from previous prime (21952753831) and next prime (21952753841).

It is not an unprimeable number, because it can be changed into a prime (21952753831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 979930 + ... + 1002081.

It is an arithmetic number, because the mean of its divisors is an integer number (1165423056).

Almost surely, 2^21952753836 is an apocalyptic number.

21952753836 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21952753836 is an abundant number, since it is smaller than the sum of its proper divisors (33987552852).

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

21952753836 is a wasteful number, since it uses less digits than its factorization.

21952753836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1982102 (or 1982100 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 51.

The spelling of 21952753836 in words is "twenty-one billion, nine hundred fifty-two million, seven hundred fifty-three thousand, eight hundred thirty-six".