20941964859 has 16 divisors (see below), whose sum is σ = 28117889024. Its totient is φ = 13863744000.

The previous prime is 20941964801. The next prime is 20941964861. The reversal of 20941964859 is 95846914902.

It is not a de Polignac number, because 20941964859 - 2¹² = 20941960763 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20941964799 and 20941964808.

It is not an unprimeable number, because it can be changed into a prime (20941964759) 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, 1529307 + ... + 1542939.

It is an arithmetic number, because the mean of its divisors is an integer number (1757368064).

Almost surely, 2^20941964859 is an apocalyptic number.

20941964859 is a deficient number, since it is larger than the sum of its proper divisors (7175924165).

20941964859 is a wasteful number, since it uses less digits than its factorization.

20941964859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17178.

The product of its (nonzero) digits is 5598720, while the sum is 57.

The spelling of 20941964859 in words is "twenty billion, nine hundred forty-one million, nine hundred sixty-four thousand, eight hundred fifty-nine".