21190707377 has 16 divisors (see below), whose sum is σ = 24895703040. Its totient is φ = 17656066368.

The previous prime is 21190707347. The next prime is 21190707403. The reversal of 21190707377 is 77370709112.

It is a cyclic number.

It is not a de Polignac number, because 21190707377 - 2⁶ = 21190707313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21190707347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243899 + ... + 319167.

It is an arithmetic number, because the mean of its divisors is an integer number (1555981440).

Almost surely, 2^21190707377 is an apocalyptic number.

It is an amenable number.

21190707377 is a deficient number, since it is larger than the sum of its proper divisors (3704995663).

21190707377 is a wasteful number, since it uses less digits than its factorization.

21190707377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76400.

The product of its (nonzero) digits is 129654, while the sum is 44.

The spelling of 21190707377 in words is "twenty-one billion, one hundred ninety million, seven hundred seven thousand, three hundred seventy-seven".