20755525 has 12 divisors (see below), whose sum is σ = 29413792. Its totient is φ = 14232240.

The previous prime is 20755519. The next prime is 20755547. The reversal of 20755525 is 52555702.

It is not a de Polignac number, because 20755525 - 2³ = 20755517 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59127 + ... + 59476.

Almost surely, 2^20755525 is an apocalyptic number.

20755525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20755525 is a deficient number, since it is larger than the sum of its proper divisors (8658267).

20755525 is a wasteful number, since it uses less digits than its factorization.

20755525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118620 (or 118615 counting only the distinct ones).

The product of its (nonzero) digits is 17500, while the sum is 31.

The square root of 20755525 is about 4555.8231967450. The cubic root of 20755525 is about 274.8176201193.

The spelling of 20755525 in words is "twenty million, seven hundred fifty-five thousand, five hundred twenty-five".