20425750 has 16 divisors (see below), whose sum is σ = 38237472. Its totient is φ = 8170200.

The previous prime is 20425729. The next prime is 20425759. The reversal of 20425750 is 5752402.

It is a super-2 number, since 2×20425750² = 834422526125000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20425759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40602 + ... + 41101.

It is an arithmetic number, because the mean of its divisors is an integer number (2389842).

Almost surely, 2^20425750 is an apocalyptic number.

20425750 is a deficient number, since it is larger than the sum of its proper divisors (17811722).

20425750 is an equidigital number, since it uses as much as digits as its factorization.

20425750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81720 (or 81710 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 20425750 is about 4519.4855901972. The cubic root of 20425750 is about 273.3543592128.

The spelling of 20425750 in words is "twenty million, four hundred twenty-five thousand, seven hundred fifty".