20430770761 has 4 divisors (see below), whose sum is σ = 20445376000. Its totient is φ = 20416165524.

The previous prime is 20430770693. The next prime is 20430770771. The reversal of 20430770761 is 16707703402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20430770761 - 2²⁷ = 20296553033 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20430770761.

It is not an unprimeable number, because it can be changed into a prime (20430770771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7300521 + ... + 7303318.

It is an arithmetic number, because the mean of its divisors is an integer number (5111344000).

Almost surely, 2^20430770761 is an apocalyptic number.

It is an amenable number.

20430770761 is a deficient number, since it is larger than the sum of its proper divisors (14605239).

20430770761 is a wasteful number, since it uses less digits than its factorization.

20430770761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14605238.

The product of its (nonzero) digits is 49392, while the sum is 37.

The spelling of 20430770761 in words is "twenty billion, four hundred thirty million, seven hundred seventy thousand, seven hundred sixty-one".