21060975376 has 135 divisors (see below), whose sum is σ = 48814327413. Its totient is φ = 8777099520.

The previous prime is 21060975371. The next prime is 21060975389. The reversal of 21060975376 is 67357906012.

The square root of 21060975376 is 145124.

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

It can be written as a sum of positive squares in only one way, i.e., 11955235600 + 9105739776 = 109340^2 + 95424^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21060975371) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 288506476 + ... + 288506548.

Almost surely, 2^21060975376 is an apocalyptic number.

21060975376 is the 145124-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21060975376

21060975376 is an abundant number, since it is smaller than the sum of its proper divisors (27753352037).

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

21060975376 is an frugal number, since it uses more digits than its factorization.

21060975376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 476280, while the sum is 46.

The spelling of 21060975376 in words is "twenty-one billion, sixty million, nine hundred seventy-five thousand, three hundred seventy-six".