20124400231 has 8 divisors (see below), whose sum is σ = 22371542144. Its totient is φ = 17977131360.

The previous prime is 20124400217. The next prime is 20124400237. The reversal of 20124400231 is 13200442102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20124400231 is a prime.

It is a super-2 number, since 2×20124400231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20124400199 and 20124400208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20124400237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24967836 + ... + 24968641.

It is an arithmetic number, because the mean of its divisors is an integer number (2796442768).

Almost surely, 2^20124400231 is an apocalyptic number.

20124400231 is a deficient number, since it is larger than the sum of its proper divisors (2247141913).

20124400231 is a wasteful number, since it uses less digits than its factorization.

20124400231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49936521.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20124400231 its reverse (13200442102), we get a palindrome (33324842333).

The spelling of 20124400231 in words is "twenty billion, one hundred twenty-four million, four hundred thousand, two hundred thirty-one".