3123400020 has 48 divisors (see below), whose sum is σ = 9418254720. Its totient is φ = 768836736.

The previous prime is 3123399989. The next prime is 3123400043. The reversal of 3123400020 is 200043213.

3123400020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2001400 + ... + 2002959.

It is an arithmetic number, because the mean of its divisors is an integer number (196213640).

Almost surely, 2^3123400020 is an apocalyptic number.

3123400020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3123400020 is an abundant number, since it is smaller than the sum of its proper divisors (6294854700).

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

3123400020 is a wasteful number, since it uses less digits than its factorization.

3123400020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4004384 (or 4004382 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 3123400020 is about 55887.3869491140. The cubic root of 3123400020 is about 1461.7593134499.

Adding to 3123400020 its reverse (200043213), we get a palindrome (3323443233).

The spelling of 3123400020 in words is "three billion, one hundred twenty-three million, four hundred thousand, twenty".