20253975 has 48 divisors (see below), whose sum is σ = 38664192. Its totient is φ = 9164160.

The previous prime is 20253973. The next prime is 20253979. The reversal of 20253975 is 57935202.

It is not a de Polignac number, because 20253975 - 2¹ = 20253973 is a prime.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20253971) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 90714 + ... + 90936.

It is an arithmetic number, because the mean of its divisors is an integer number (805504).

Almost surely, 2^20253975 is an apocalyptic number.

20253975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20253975 is a deficient number, since it is larger than the sum of its proper divisors (18410217).

20253975 is a wasteful number, since it uses less digits than its factorization.

20253975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416 (or 411 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 20253975 is about 4500.4416449944. The cubic root of 20253975 is about 272.5859224601.

The spelling of 20253975 in words is "twenty million, two hundred fifty-three thousand, nine hundred seventy-five".