20366375651 has 2 divisors, whose sum is σ = 20366375652. Its totient is φ = 20366375650.

The previous prime is 20366375621. The next prime is 20366375677. The reversal of 20366375651 is 15657366302.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20366375651 - 2⁶ = 20366375587 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20366375621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10183187825 + 10183187826.

It is an arithmetic number, because the mean of its divisors is an integer number (10183187826).

Almost surely, 2^20366375651 is an apocalyptic number.

20366375651 is a deficient number, since it is larger than the sum of its proper divisors (1).

20366375651 is an equidigital number, since it uses as much as digits as its factorization.

20366375651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 680400, while the sum is 44.

The spelling of 20366375651 in words is "twenty billion, three hundred sixty-six million, three hundred seventy-five thousand, six hundred fifty-one".