21777153132 has 48 divisors (see below), whose sum is σ = 58097636352. Its totient is φ = 6219340800.

The previous prime is 21777153131. The next prime is 21777153161. The reversal of 21777153132 is 23135177712.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (21777153131) 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, 142348 + ... + 252620.

It is an arithmetic number, because the mean of its divisors is an integer number (1210367424).

Almost surely, 2^21777153132 is an apocalyptic number.

It is an amenable number.

21777153132 is an abundant number, since it is smaller than the sum of its proper divisors (36320483220).

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

21777153132 is a wasteful number, since it uses less digits than its factorization.

21777153132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112638 (or 112636 counting only the distinct ones).

The product of its digits is 61740, while the sum is 39.

The spelling of 21777153132 in words is "twenty-one billion, seven hundred seventy-seven million, one hundred fifty-three thousand, one hundred thirty-two".