20207923969 has 2 divisors, whose sum is σ = 20207923970. Its totient is φ = 20207923968.

The previous prime is 20207923951. The next prime is 20207923973. The reversal of 20207923969 is 96932970202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11496128400 + 8711795569 = 107220^2 + 93337^2 .

It is a cyclic number.

It is not a de Polignac number, because 20207923969 - 2¹⁵ = 20207891201 is a prime.

It is a super-2 number, since 2×20207923969² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20207923949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10103961984 + 10103961985.

It is an arithmetic number, because the mean of its divisors is an integer number (10103961985).

Almost surely, 2^20207923969 is an apocalyptic number.

It is an amenable number.

20207923969 is a deficient number, since it is larger than the sum of its proper divisors (1).

20207923969 is an equidigital number, since it uses as much as digits as its factorization.

20207923969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 734832, while the sum is 49.

The spelling of 20207923969 in words is "twenty billion, two hundred seven million, nine hundred twenty-three thousand, nine hundred sixty-nine".