20477975051 has 2 divisors, whose sum is σ = 20477975052. Its totient is φ = 20477975050.

The previous prime is 20477974987. The next prime is 20477975081. The reversal of 20477975051 is 15057977402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20477975051 - 2⁶ = 20477974987 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20477974987 and 20477975005.

It is not a weakly prime, because it can be changed into another prime (20477975081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10238987525 + 10238987526.

It is an arithmetic number, because the mean of its divisors is an integer number (10238987526).

Almost surely, 2^20477975051 is an apocalyptic number.

20477975051 is a deficient number, since it is larger than the sum of its proper divisors (1).

20477975051 is an equidigital number, since it uses as much as digits as its factorization.

20477975051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 617400, while the sum is 47.

The spelling of 20477975051 in words is "twenty billion, four hundred seventy-seven million, nine hundred seventy-five thousand, fifty-one".