20510342797 has 12 divisors (see below), whose sum is σ = 23610396576. Its totient is φ = 17453701800.

The previous prime is 20510342789. The next prime is 20510342807. The reversal of 20510342797 is 79724301502.

It is not a de Polignac number, because 20510342797 - 2³ = 20510342789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20510342777) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59422 + ... + 211072.

It is an arithmetic number, because the mean of its divisors is an integer number (1967533048).

Almost surely, 2^20510342797 is an apocalyptic number.

It is an amenable number.

20510342797 is a deficient number, since it is larger than the sum of its proper divisors (3100053779).

20510342797 is an equidigital number, since it uses as much as digits as its factorization.

20510342797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151936 (or 151797 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 40.

The spelling of 20510342797 in words is "twenty billion, five hundred ten million, three hundred forty-two thousand, seven hundred ninety-seven".