20797425 has 48 divisors (see below), whose sum is σ = 41693760. Its totient is φ = 10080000.

The previous prime is 20797411. The next prime is 20797463. The reversal of 20797425 is 52479702.

It is not a de Polignac number, because 20797425 - 2⁸ = 20797169 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20797425.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6025 + ... + 8825.

It is an arithmetic number, because the mean of its divisors is an integer number (868620).

Almost surely, 2^20797425 is an apocalyptic number.

20797425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20797425 is an abundant number, since it is smaller than the sum of its proper divisors (20896335).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20797425 is a wasteful number, since it uses less digits than its factorization.

20797425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2831 (or 2820 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 20797425 is about 4560.4193886089. The cubic root of 20797425 is about 275.0024242211.

The spelling of 20797425 in words is "twenty million, seven hundred ninety-seven thousand, four hundred twenty-five".