21376144036 has 48 divisors (see below), whose sum is σ = 40476744000. Its totient is φ = 9819285120.

The previous prime is 21376143973. The next prime is 21376144057. The reversal of 21376144036 is 63044167312.

It is a junction number, because it is equal to n+sod(n) for n = 21376143986 and 21376144004.

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, 11961135 + ... + 11962921.

It is an arithmetic number, because the mean of its divisors is an integer number (843265500).

Almost surely, 2^21376144036 is an apocalyptic number.

21376144036 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21376144036 is a deficient number, since it is larger than the sum of its proper divisors (19100599964).

21376144036 is a wasteful number, since it uses less digits than its factorization.

21376144036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2764 (or 2762 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 37.

The spelling of 21376144036 in words is "twenty-one billion, three hundred seventy-six million, one hundred forty-four thousand, thirty-six".