20454785051 has 2 divisors, whose sum is σ = 20454785052. Its totient is φ = 20454785050.

The previous prime is 20454785047. The next prime is 20454785119. The reversal of 20454785051 is 15058745402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20454785051 - 2² = 20454785047 is a prime.

It is a super-2 number, since 2×20454785051² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20454787051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10227392525 + 10227392526.

It is an arithmetic number, because the mean of its divisors is an integer number (10227392526).

Almost surely, 2^20454785051 is an apocalyptic number.

20454785051 is a deficient number, since it is larger than the sum of its proper divisors (1).

20454785051 is an equidigital number, since it uses as much as digits as its factorization.

20454785051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224000, while the sum is 41.

The spelling of 20454785051 in words is "twenty billion, four hundred fifty-four million, seven hundred eighty-five thousand, fifty-one".