20939951410807 has 32 divisors (see below), whose sum is σ = 25499191624704. Its totient is φ = 16941426480000.

The previous prime is 20939951410787. The next prime is 20939951410879. The reversal of 20939951410807 is 70801415993902.

It is a de Polignac number, because none of the positive numbers 2^k-20939951410807 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 (20939951410607) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22800444 + ... + 23701057.

It is an arithmetic number, because the mean of its divisors is an integer number (796849738272).

Almost surely, 2^{20939951410807} is an apocalyptic number.

20939951410807 is a deficient number, since it is larger than the sum of its proper divisors (4559240213897).

20939951410807 is a wasteful number, since it uses less digits than its factorization.

20939951410807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46501639.

The product of its (nonzero) digits is 4898880, while the sum is 58.

The spelling of 20939951410807 in words is "twenty trillion, nine hundred thirty-nine billion, nine hundred fifty-one million, four hundred ten thousand, eight hundred seven".