21177328674 has 32 divisors (see below), whose sum is σ = 44592914880. Its totient is φ = 6686217792.

The previous prime is 21177328673. The next prime is 21177328709. The reversal of 21177328674 is 47682377112.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21177328673) 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, 646704 + ... + 678660.

It is an arithmetic number, because the mean of its divisors is an integer number (1393528590).

Almost surely, 2^21177328674 is an apocalyptic number.

21177328674 is an abundant number, since it is smaller than the sum of its proper divisors (23415586206).

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

21177328674 is a wasteful number, since it uses less digits than its factorization.

21177328674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37794.

The product of its digits is 790272, while the sum is 48.

The spelling of 21177328674 in words is "twenty-one billion, one hundred seventy-seven million, three hundred twenty-eight thousand, six hundred seventy-four".