21327735192 has 64 divisors (see below), whose sum is σ = 53543669760. Its totient is φ = 7079404800.

The previous prime is 21327735173. The next prime is 21327735197. The reversal of 21327735192 is 29153772312.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21327735197) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6287817 + ... + 6291207.

It is an arithmetic number, because the mean of its divisors is an integer number (836619840).

Almost surely, 2^21327735192 is an apocalyptic number.

It is an amenable number.

21327735192 is an abundant number, since it is smaller than the sum of its proper divisors (32215934568).

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

21327735192 is a wasteful number, since it uses less digits than its factorization.

21327735192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4424 (or 4420 counting only the distinct ones).

The product of its digits is 158760, while the sum is 42.

The spelling of 21327735192 in words is "twenty-one billion, three hundred twenty-seven million, seven hundred thirty-five thousand, one hundred ninety-two".