21376029525 has 12 divisors (see below), whose sum is σ = 35341702272. Its totient is φ = 11400549040.

The previous prime is 21376029497. The next prime is 21376029527. The reversal of 21376029525 is 52592067312.

It is not a de Polignac number, because 21376029525 - 2¹⁶ = 21375963989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21376029527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142506789 + ... + 142506938.

It is an arithmetic number, because the mean of its divisors is an integer number (2945141856).

Almost surely, 2^21376029525 is an apocalyptic number.

21376029525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21376029525 is a deficient number, since it is larger than the sum of its proper divisors (13965672747).

21376029525 is a wasteful number, since it uses less digits than its factorization.

21376029525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285013740 (or 285013735 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 42.

The spelling of 21376029525 in words is "twenty-one billion, three hundred seventy-six million, twenty-nine thousand, five hundred twenty-five".