21332629377 has 12 divisors (see below), whose sum is σ = 30890645604. Its totient is φ = 14186284800.

The previous prime is 21332629349. The next prime is 21332629391. The reversal of 21332629377 is 77392623312.

21332629377 is a `hidden beast` number, since 2 + 13 + 3 + 2 + 629 + 3 + 7 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19617924096 + 1714705281 = 140064^2 + 41409^2 .

It is not a de Polignac number, because 21332629377 - 2⁷ = 21332629249 is a prime.

It is a super-2 number, since 2×21332629377² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21332629397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2951868 + ... + 2959085.

It is an arithmetic number, because the mean of its divisors is an integer number (2574220467).

Almost surely, 2^21332629377 is an apocalyptic number.

It is an amenable number.

21332629377 is a deficient number, since it is larger than the sum of its proper divisors (9558016227).

21332629377 is a wasteful number, since it uses less digits than its factorization.

21332629377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5911360 (or 5911357 counting only the distinct ones).

The product of its digits is 571536, while the sum is 45.

The spelling of 21332629377 in words is "twenty-one billion, three hundred thirty-two million, six hundred twenty-nine thousand, three hundred seventy-seven".