20625402123 has 12 divisors (see below), whose sum is σ = 29799249480. Its totient is φ = 13747036416.

The previous prime is 20625402113. The next prime is 20625402151. The reversal of 20625402123 is 32120452602.

It is a happy number.

20625402123 is a `hidden beast` number, since 20 + 62 + 540 + 21 + 23 = 666.

It is not a de Polignac number, because 20625402123 - 2⁹ = 20625401611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20625402103) 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, 228561 + ... + 305762.

It is an arithmetic number, because the mean of its divisors is an integer number (2483270790).

Almost surely, 2^20625402123 is an apocalyptic number.

20625402123 is a deficient number, since it is larger than the sum of its proper divisors (9173847357).

20625402123 is a wasteful number, since it uses less digits than its factorization.

20625402123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538618 (or 538615 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 20625402123 its reverse (32120452602), we get a palindrome (52745854725).

The spelling of 20625402123 in words is "twenty billion, six hundred twenty-five million, four hundred two thousand, one hundred twenty-three".