20539148597 has 4 divisors (see below), whose sum is σ = 22406343936. Its totient is φ = 18671953260.

The previous prime is 20539148573. The next prime is 20539148633. The reversal of 20539148597 is 79584193502.

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 20539148597 - 2⁸ = 20539148341 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 (20539148507) 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, 933597653 + ... + 933597674.

It is an arithmetic number, because the mean of its divisors is an integer number (5601585984).

Almost surely, 2^20539148597 is an apocalyptic number.

It is an amenable number.

20539148597 is a deficient number, since it is larger than the sum of its proper divisors (1867195339).

20539148597 is a wasteful number, since it uses less digits than its factorization.

20539148597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1867195338.

The product of its (nonzero) digits is 2721600, while the sum is 53.

The spelling of 20539148597 in words is "twenty billion, five hundred thirty-nine million, one hundred forty-eight thousand, five hundred ninety-seven".