20247437250641 has 16 divisors (see below), whose sum is σ = 21344368267200. Its totient is φ = 19153639297728.

The previous prime is 20247437250631. The next prime is 20247437250643. The reversal of 20247437250641 is 14605273474202.

It is a cyclic number.

It is not a de Polignac number, because 20247437250641 - 2²⁶ = 20247370141777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20247437250643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145147115 + ... + 145286543.

It is an arithmetic number, because the mean of its divisors is an integer number (1334023016700).

Almost surely, 2^{20247437250641} is an apocalyptic number.

It is an amenable number.

20247437250641 is a deficient number, since it is larger than the sum of its proper divisors (1096931016559).

20247437250641 is a wasteful number, since it uses less digits than its factorization.

20247437250641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150608.

The product of its (nonzero) digits is 2257920, while the sum is 47.

The spelling of 20247437250641 in words is "twenty trillion, two hundred forty-seven billion, four hundred thirty-seven million, two hundred fifty thousand, six hundred forty-one".