10423653435421 has 2 divisors, whose sum is σ = 10423653435422. Its totient is φ = 10423653435420.

The previous prime is 10423653435373. The next prime is 10423653435457. The reversal of 10423653435421 is 12453435632401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9873703640025 + 549949795396 = 3142245^2 + 741586^2 .

It is a cyclic number.

It is not a de Polignac number, because 10423653435421 - 2²⁷ = 10423519217693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10423653435521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5211826717710 + 5211826717711.

It is an arithmetic number, because the mean of its divisors is an integer number (5211826717711).

Almost surely, 2^{10423653435421} is an apocalyptic number.

It is an amenable number.

10423653435421 is a deficient number, since it is larger than the sum of its proper divisors (1).

10423653435421 is an equidigital number, since it uses as much as digits as its factorization.

10423653435421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1036800, while the sum is 43.

The spelling of 10423653435421 in words is "ten trillion, four hundred twenty-three billion, six hundred fifty-three million, four hundred thirty-five thousand, four hundred twenty-one".