21038342116 has 81 divisors (see below), whose sum is σ = 42833836227. Its totient is φ = 9033464880.

The previous prime is 21038342113. The next prime is 21038342131. The reversal of 21038342116 is 61124383012.

The square root of 21038342116 is 145046.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×21038342116² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21038342111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 60629055 + ... + 60629401.

Almost surely, 2^21038342116 is an apocalyptic number.

21038342116 is the 145046-th square number.

It is an amenable number.

21038342116 is an abundant number, since it is smaller than the sum of its proper divisors (21795494111).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21038342116 is a wasteful number, since it uses less digits than its factorization.

21038342116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 21038342116 in words is "twenty-one billion, thirty-eight million, three hundred forty-two thousand, one hundred sixteen".