21736191732 has 72 divisors (see below), whose sum is σ = 51982414848. Its totient is φ = 7068660480.

The previous prime is 21736191713. The next prime is 21736191761. The reversal of 21736191732 is 23719163712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5668888 + ... + 5672720.

It is an arithmetic number, because the mean of its divisors is an integer number (721977984).

Almost surely, 2^21736191732 is an apocalyptic number.

It is an amenable number.

21736191732 is an abundant number, since it is smaller than the sum of its proper divisors (30246223116).

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

21736191732 is a wasteful number, since it uses less digits than its factorization.

21736191732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4089 (or 4026 counting only the distinct ones).

The product of its digits is 95256, while the sum is 42.

The spelling of 21736191732 in words is "twenty-one billion, seven hundred thirty-six million, one hundred ninety-one thousand, seven hundred thirty-two".