21376029507 has 16 divisors (see below), whose sum is σ = 32577272832. Its totient is φ = 12213270720.

The previous prime is 21376029497. The next prime is 21376029527. The reversal of 21376029507 is 70592067312.

It is not a de Polignac number, because 21376029507 - 2⁷ = 21376029379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21376029527) 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 15 ways as a sum of consecutive naturals, for example, 107583 + ... + 233079.

It is an arithmetic number, because the mean of its divisors is an integer number (2036079552).

Almost surely, 2^21376029507 is an apocalyptic number.

21376029507 is a deficient number, since it is larger than the sum of its proper divisors (11201243325).

21376029507 is a wasteful number, since it uses less digits than its factorization.

21376029507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133618.

The product of its (nonzero) digits is 158760, while the sum is 42.

The spelling of 21376029507 in words is "twenty-one billion, three hundred seventy-six million, twenty-nine thousand, five hundred seven".