1008100920 has 32 divisors (see below), whose sum is σ = 3024303120. Its totient is φ = 268826880.

The previous prime is 1008100913. The next prime is 1008100931. The reversal of 1008100920 is 290018001.

It is a congruent number.

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, 4200301 + ... + 4200540.

Almost surely, 2^1008100920 is an apocalyptic number.

1008100920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1008100920 is an abundant number, since it is smaller than the sum of its proper divisors (2016202200).

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

1008100920 is a wasteful number, since it uses less digits than its factorization.

1008100920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8400855 (or 8400851 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 1008100920 is about 31750.6050336053. The cubic root of 1008100920 is about 1002.6930476506.

Adding to 1008100920 its reverse (290018001), we get a palindrome (1298118921).

The spelling of 1008100920 in words is "one billion, eight million, one hundred thousand, nine hundred twenty".