21000790377 has 40 divisors (see below), whose sum is σ = 35865236352. Its totient is φ = 11996424000.

The previous prime is 21000790367. The next prime is 21000790379. The reversal of 21000790377 is 77309700012.

21000790377 is a `hidden beast` number, since 210 + 0 + 0 + 79 + 0 + 377 = 666.

It is not a de Polignac number, because 21000790377 - 2⁴ = 21000790361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21000790379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2803477 + ... + 2810957.

Almost surely, 2^21000790377 is an apocalyptic number.

21000790377 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

21000790377 is a deficient number, since it is larger than the sum of its proper divisors (14864445975).

21000790377 is an equidigital number, since it uses as much as digits as its factorization.

21000790377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12451 (or 12442 counting only the distinct ones).

The product of its (nonzero) digits is 18522, while the sum is 36.

The spelling of 21000790377 in words is "twenty-one billion, seven hundred ninety thousand, three hundred seventy-seven".