20252478 has 16 divisors (see below), whose sum is σ = 40899456. Its totient is φ = 6685080.

The previous prime is 20252473. The next prime is 20252497. The reversal of 20252478 is 87425202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20252473) 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, 15768 + ... + 17003.

It is an arithmetic number, because the mean of its divisors is an integer number (2556216).

Almost surely, 2^20252478 is an apocalyptic number.

20252478 is an abundant number, since it is smaller than the sum of its proper divisors (20646978).

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

20252478 is a wasteful number, since it uses less digits than its factorization.

20252478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32879.

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 20252478 is about 4500.2753249107. The cubic root of 20252478 is about 272.5792065573.

The spelling of 20252478 in words is "twenty million, two hundred fifty-two thousand, four hundred seventy-eight".