21637343379004 has 48 divisors (see below), whose sum is σ = 38868210339840. Its totient is φ = 10535366088000.

The previous prime is 21637343378983. The next prime is 21637343379013. The reversal of 21637343379004 is 40097334373612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25534677 + ... + 26368435.

It is an arithmetic number, because the mean of its divisors is an integer number (809754382080).

Almost surely, 2^{21637343379004} is an apocalyptic number.

It is an amenable number.

21637343379004 is a deficient number, since it is larger than the sum of its proper divisors (17230866960836).

21637343379004 is a wasteful number, since it uses less digits than its factorization.

21637343379004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834730 (or 834728 counting only the distinct ones).

The product of its (nonzero) digits is 6858432, while the sum is 52.

The spelling of 21637343379004 in words is "twenty-one trillion, six hundred thirty-seven billion, three hundred forty-three million, three hundred seventy-nine thousand, four".