20295440 has 40 divisors (see below), whose sum is σ = 51478848. Its totient is φ = 7379840.

The previous prime is 20295427. The next prime is 20295479. The reversal of 20295440 is 4459202.

It is a tau number, because it is divible by the number of its divisors (40).

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, 10652 + ... + 12411.

Almost surely, 2^20295440 is an apocalyptic number.

20295440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20295440 is an abundant number, since it is smaller than the sum of its proper divisors (31183408).

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

20295440 is a wasteful number, since it uses less digits than its factorization.

20295440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23087 (or 23081 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 20295440 is about 4505.0460596979. The cubic root of 20295440 is about 272.7718130622.

The spelling of 20295440 in words is "twenty million, two hundred ninety-five thousand, four hundred forty".