20549759247894 has 64 divisors (see below), whose sum is σ = 42602098581504. Its totient is φ = 6603783844896.

The previous prime is 20549759247889. The next prime is 20549759247907. The reversal of 20549759247894 is 49874295794502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22311699 + ... + 23214465.

It is an arithmetic number, because the mean of its divisors is an integer number (665657790336).

Almost surely, 2^{20549759247894} is an apocalyptic number.

20549759247894 is an abundant number, since it is smaller than the sum of its proper divisors (22052339333610).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20549759247894 is a wasteful number, since it uses less digits than its factorization.

20549759247894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903961.

The product of its (nonzero) digits is 1828915200, while the sum is 75.

The spelling of 20549759247894 in words is "twenty trillion, five hundred forty-nine billion, seven hundred fifty-nine million, two hundred forty-seven thousand, eight hundred ninety-four".