20895140 has 24 divisors (see below), whose sum is σ = 50148672. Its totient is φ = 7164000.

The previous prime is 20895139. The next prime is 20895143. The reversal of 20895140 is 4159802.

It is not an unprimeable number, because it can be changed into a prime (20895143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74486 + ... + 74765.

It is an arithmetic number, because the mean of its divisors is an integer number (2089528).

Almost surely, 2^20895140 is an apocalyptic number.

20895140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20895140 is an abundant number, since it is smaller than the sum of its proper divisors (29253532).

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

20895140 is a wasteful number, since it uses less digits than its factorization.

20895140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149267 (or 149265 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 20895140 is about 4571.1202128144. The cubic root of 20895140 is about 275.4324435834.

The spelling of 20895140 in words is "twenty million, eight hundred ninety-five thousand, one hundred forty".