10120394820 has 24 divisors (see below), whose sum is σ = 28337105664. Its totient is φ = 2698771936.

The previous prime is 10120394773. The next prime is 10120394833. The reversal of 10120394820 is 2849302101.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 84336564 + ... + 84336683.

It is an arithmetic number, because the mean of its divisors is an integer number (1180712736).

Almost surely, 2^10120394820 is an apocalyptic number.

10120394820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10120394820 is an abundant number, since it is smaller than the sum of its proper divisors (18216710844).

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

10120394820 is a wasteful number, since it uses less digits than its factorization.

10120394820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168673259 (or 168673257 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

Adding to 10120394820 its reverse (2849302101), we get a palindrome (12969696921).

The spelling of 10120394820 in words is "ten billion, one hundred twenty million, three hundred ninety-four thousand, eight hundred twenty".