21877029742 has 8 divisors (see below), whose sum is σ = 34542678600. Its totient is φ = 10362803544.

The previous prime is 21877029721. The next prime is 21877029767. The reversal of 21877029742 is 24792077812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287855617 + ... + 287855692.

It is an arithmetic number, because the mean of its divisors is an integer number (4317834825).

Almost surely, 2^21877029742 is an apocalyptic number.

21877029742 is a deficient number, since it is larger than the sum of its proper divisors (12665648858).

21877029742 is a wasteful number, since it uses less digits than its factorization.

21877029742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575711330.

The product of its (nonzero) digits is 790272, while the sum is 49.

The spelling of 21877029742 in words is "twenty-one billion, eight hundred seventy-seven million, twenty-nine thousand, seven hundred forty-two".