21377614044 has 48 divisors (see below), whose sum is σ = 51640339968. Its totient is φ = 6878706048.

The previous prime is 21377614031. The next prime is 21377614057. The reversal of 21377614044 is 44041677312.

It is an interprime number because it is at equal distance from previous prime (21377614031) and next prime (21377614057).

It is a junction number, because it is equal to n+sod(n) for n = 21377613993 and 21377614011.

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, 218442 + ... + 300785.

It is an arithmetic number, because the mean of its divisors is an integer number (1075840416).

Almost surely, 2^21377614044 is an apocalyptic number.

It is an amenable number.

21377614044 is an abundant number, since it is smaller than the sum of its proper divisors (30262725924).

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

21377614044 is a wasteful number, since it uses less digits than its factorization.

21377614044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519354 (or 519352 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 39.

The spelling of 21377614044 in words is "twenty-one billion, three hundred seventy-seven million, six hundred fourteen thousand, forty-four".