20025009923 has 2 divisors, whose sum is σ = 20025009924. Its totient is φ = 20025009922.

The previous prime is 20025009919. The next prime is 20025009931. The reversal of 20025009923 is 32990052002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20025009923 - 2² = 20025009919 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20025009923.

It is not a weakly prime, because it can be changed into another prime (20025009943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10012504961 + 10012504962.

It is an arithmetic number, because the mean of its divisors is an integer number (10012504962).

Almost surely, 2^20025009923 is an apocalyptic number.

20025009923 is a deficient number, since it is larger than the sum of its proper divisors (1).

20025009923 is an equidigital number, since it uses as much as digits as its factorization.

20025009923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 32.

The spelling of 20025009923 in words is "twenty billion, twenty-five million, nine thousand, nine hundred twenty-three".