20662866719 has 16 divisors (see below), whose sum is σ = 24306428160. Its totient is φ = 17361720000.

The previous prime is 20662866703. The next prime is 20662866751. The reversal of 20662866719 is 91766826602.

It is a cyclic number.

It is not a de Polignac number, because 20662866719 - 2⁴ = 20662866703 is a prime.

It is a super-2 number, since 2×20662866719² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20662866769) 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, 1197107 + ... + 1214244.

It is an arithmetic number, because the mean of its divisors is an integer number (1519151760).

Almost surely, 2^20662866719 is an apocalyptic number.

20662866719 is a deficient number, since it is larger than the sum of its proper divisors (3643561441).

20662866719 is a wasteful number, since it uses less digits than its factorization.

20662866719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2411422.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The spelling of 20662866719 in words is "twenty billion, six hundred sixty-two million, eight hundred sixty-six thousand, seven hundred nineteen".