20124320004 has 36 divisors (see below), whose sum is σ = 50881013820. Its totient is φ = 6706629120.

The previous prime is 20124319991. The next prime is 20124320009. The reversal of 20124320004 is 40002342102.

It can be written as a sum of positive squares in 2 ways, for example, as 15033212100 + 5091107904 = 122610^2 + 71352^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20124320009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110752 + ... + 229160.

It is an arithmetic number, because the mean of its divisors is an integer number (1413361495).

Almost surely, 2^20124320004 is an apocalyptic number.

It is an amenable number.

20124320004 is an abundant number, since it is smaller than the sum of its proper divisors (30756693816).

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

20124320004 is a wasteful number, since it uses less digits than its factorization.

20124320004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123140 (or 123135 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 20124320004 its reverse (40002342102), we get a palindrome (60126662106).

The spelling of 20124320004 in words is "twenty billion, one hundred twenty-four million, three hundred twenty thousand, four".