20524531 has 2 divisors, whose sum is σ = 20524532. Its totient is φ = 20524530.

The previous prime is 20524523. The next prime is 20524613. The reversal of 20524531 is 13542502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20524531 - 2³ = 20524523 is a prime.

It is a super-2 number, since 2×20524531² = 842512745539922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20534531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10262265 + 10262266.

It is an arithmetic number, because the mean of its divisors is an integer number (10262266).

Almost surely, 2^20524531 is an apocalyptic number.

20524531 is a deficient number, since it is larger than the sum of its proper divisors (1).

20524531 is an equidigital number, since it uses as much as digits as its factorization.

20524531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 20524531 is about 4530.4007549002. The cubic root of 20524531 is about 273.7943072366.

The spelling of 20524531 in words is "twenty million, five hundred twenty-four thousand, five hundred thirty-one".