21936039892 has 24 divisors (see below), whose sum is σ = 41345024000. Its totient is φ = 10123340256.

The previous prime is 21936039887. The next prime is 21936039893. The reversal of 21936039892 is 29893063912.

It is a super-2 number, since 2×21936039892² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21936039893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1054609 + ... + 1075207.

Almost surely, 2^21936039892 is an apocalyptic number.

It is an amenable number.

21936039892 is a deficient number, since it is larger than the sum of its proper divisors (19408984108).

21936039892 is a wasteful number, since it uses less digits than its factorization.

21936039892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41095 (or 41093 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 52.

The spelling of 21936039892 in words is "twenty-one billion, nine hundred thirty-six million, thirty-nine thousand, eight hundred ninety-two".