20625499 has 2 divisors, whose sum is σ = 20625500. Its totient is φ = 20625498.

The previous prime is 20625491. The next prime is 20625529. The reversal of 20625499 is 99452602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20625499 - 2³ = 20625491 is a prime.

It is a super-2 number, since 2×20625499² = 850822417998002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20625491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10312749 + 10312750.

It is an arithmetic number, because the mean of its divisors is an integer number (10312750).

Almost surely, 2^20625499 is an apocalyptic number.

20625499 is a deficient number, since it is larger than the sum of its proper divisors (1).

20625499 is an equidigital number, since it uses as much as digits as its factorization.

20625499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 20625499 is about 4541.5304689058. The cubic root of 20625499 is about 274.2425392551.

The spelling of 20625499 in words is "twenty million, six hundred twenty-five thousand, four hundred ninety-nine".