20929136597 has 4 divisors (see below), whose sum is σ = 20941456800. Its totient is φ = 20916816396.

The previous prime is 20929136581. The next prime is 20929136623. The reversal of 20929136597 is 79563192902.

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 20929136597 - 2⁴ = 20929136581 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 (20929136497) 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, 6157553 + ... + 6160950.

It is an arithmetic number, because the mean of its divisors is an integer number (5235364200).

Almost surely, 2^20929136597 is an apocalyptic number.

It is an amenable number.

20929136597 is a deficient number, since it is larger than the sum of its proper divisors (12320203).

20929136597 is a wasteful number, since it uses less digits than its factorization.

20929136597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12320202.

The product of its (nonzero) digits is 1837080, while the sum is 53.

The spelling of 20929136597 in words is "twenty billion, nine hundred twenty-nine million, one hundred thirty-six thousand, five hundred ninety-seven".