20100940 has 24 divisors (see below), whose sum is σ = 42724080. Its totient is φ = 7942848.

The previous prime is 20100937. The next prime is 20100943. The reversal of 20100940 is 4900102.

It is an interprime number because it is at equal distance from previous prime (20100937) and next prime (20100943).

It is not an unprimeable number, because it can be changed into a prime (20100943) 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, 4395 + ... + 7714.

It is an arithmetic number, because the mean of its divisors is an integer number (1780170).

Almost surely, 2^20100940 is an apocalyptic number.

20100940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20100940 is an abundant number, since it is smaller than the sum of its proper divisors (22623140).

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

20100940 is a wasteful number, since it uses less digits than its factorization.

20100940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12201 (or 12199 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 20100940 is about 4483.4071865045. The cubic root of 20100940 is about 271.8976510832.

The spelling of 20100940 in words is "twenty million, one hundred thousand, nine hundred forty".