20971460 has 12 divisors (see below), whose sum is σ = 44040108. Its totient is φ = 8388576.

The previous prime is 20971451. The next prime is 20971493. The reversal of 20971460 is 6417902.

It can be written as a sum of positive squares in 2 ways, for example, as 8340544 + 12630916 = 2888^2 + 3554^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 524267 + ... + 524306.

It is an arithmetic number, because the mean of its divisors is an integer number (3670009).

Almost surely, 2^20971460 is an apocalyptic number.

20971460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20971460 is an abundant number, since it is smaller than the sum of its proper divisors (23068648).

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

20971460 is a wasteful number, since it uses less digits than its factorization.

20971460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048582 (or 1048580 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 20971460 is about 4579.4606669345. The cubic root of 20971460 is about 275.7673773313.

The spelling of 20971460 in words is "twenty million, nine hundred seventy-one thousand, four hundred sixty".