20624406031 has 2 divisors, whose sum is σ = 20624406032. Its totient is φ = 20624406030.

The previous prime is 20624406017. The next prime is 20624406053. The reversal of 20624406031 is 13060442602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20624406031 - 2¹⁷ = 20624274959 is a prime.

It is a super-2 number, since 2×20624406031² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20624406631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10312203015 + 10312203016.

It is an arithmetic number, because the mean of its divisors is an integer number (10312203016).

Almost surely, 2^20624406031 is an apocalyptic number.

20624406031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20624406031 is an equidigital number, since it uses as much as digits as its factorization.

20624406031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 20624406031 its reverse (13060442602), we get a palindrome (33684848633).

The spelling of 20624406031 in words is "twenty billion, six hundred twenty-four million, four hundred six thousand, thirty-one".