20625530 has 8 divisors (see below), whose sum is σ = 37125972. Its totient is φ = 8250208.

The previous prime is 20625529. The next prime is 20625541. The reversal of 20625530 is 3552602.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20313049 + 312481 = 4507^2 + 559^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20625496 and 20625505.

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, 1031267 + ... + 1031286.

Almost surely, 2^20625530 is an apocalyptic number.

20625530 is a deficient number, since it is larger than the sum of its proper divisors (16500442).

20625530 is a wasteful number, since it uses less digits than its factorization.

20625530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2062560.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 20625530 is about 4541.5338818509. The cubic root of 20625530 is about 274.2426766500.

The spelling of 20625530 in words is "twenty million, six hundred twenty-five thousand, five hundred thirty".