20275940 has 24 divisors (see below), whose sum is σ = 43303680. Its totient is φ = 7972448.

The previous prime is 20275921. The next prime is 20275979. The reversal of 20275940 is 4957202.

It is a super-2 number, since 2×20275940² = 822227485767200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7412 + ... + 9771.

It is an arithmetic number, because the mean of its divisors is an integer number (1804320).

Almost surely, 2^20275940 is an apocalyptic number.

20275940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20275940 is an abundant number, since it is smaller than the sum of its proper divisors (23027740).

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

20275940 is a wasteful number, since it uses less digits than its factorization.

20275940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17251 (or 17249 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 20275940 is about 4502.8812997902. The cubic root of 20275940 is about 272.6844247163.

The spelling of 20275940 in words is "twenty million, two hundred seventy-five thousand, nine hundred forty".