20758187513894 has 4 divisors (see below), whose sum is σ = 31137281270844. Its totient is φ = 10379093756946.

The previous prime is 20758187513851. The next prime is 20758187513933. The reversal of 20758187513894 is 49831578185702.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5189546878472 + ... + 5189546878475.

It is an arithmetic number, because the mean of its divisors is an integer number (7784320317711).

Almost surely, 2^{20758187513894} is an apocalyptic number.

20758187513894 is a deficient number, since it is larger than the sum of its proper divisors (10379093756950).

20758187513894 is a wasteful number, since it uses less digits than its factorization.

20758187513894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10379093756949.

The product of its (nonzero) digits is 135475200, while the sum is 68.

The spelling of 20758187513894 in words is "twenty trillion, seven hundred fifty-eight billion, one hundred eighty-seven million, five hundred thirteen thousand, eight hundred ninety-four".