20974527 has 18 divisors (see below), whose sum is σ = 34684728. Its totient is φ = 11964672.

The previous prime is 20974519. The next prime is 20974531. The reversal of 20974527 is 72547902.

It is not a de Polignac number, because 20974527 - 2³ = 20974519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20974491 and 20974500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20974567) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 36063 + ... + 36639.

Almost surely, 2^20974527 is an apocalyptic number.

20974527 is a deficient number, since it is larger than the sum of its proper divisors (13710201).

20974527 is an frugal number, since it uses more digits than its factorization.

20974527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167 (or 587 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 20974527 is about 4579.7955194528. The cubic root of 20974527 is about 275.7808200024.

The spelling of 20974527 in words is "twenty million, nine hundred seventy-four thousand, five hundred twenty-seven".