20699040971 has 16 divisors (see below), whose sum is σ = 24920079360. Its totient is φ = 16795434240.

The previous prime is 20699040961. The next prime is 20699041109. The reversal of 20699040971 is 17904099602.

It is a cyclic number.

It is not a de Polignac number, because 20699040971 - 2¹⁴ = 20699024587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20699040911) 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, 117851 + ... + 235131.

It is an arithmetic number, because the mean of its divisors is an integer number (1557504960).

Almost surely, 2^20699040971 is an apocalyptic number.

20699040971 is a deficient number, since it is larger than the sum of its proper divisors (4221038389).

20699040971 is a wasteful number, since it uses less digits than its factorization.

20699040971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118634.

The product of its (nonzero) digits is 244944, while the sum is 47.

The spelling of 20699040971 in words is "twenty billion, six hundred ninety-nine million, forty thousand, nine hundred seventy-one".