20211996670 has 8 divisors (see below), whose sum is σ = 36381594024. Its totient is φ = 8084798664.

The previous prime is 20211996667. The next prime is 20211996671. The reversal of 20211996670 is 7669911202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211996671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1010599824 + ... + 1010599843.

It is an arithmetic number, because the mean of its divisors is an integer number (4547699253).

Almost surely, 2^20211996670 is an apocalyptic number.

20211996670 is a deficient number, since it is larger than the sum of its proper divisors (16169597354).

20211996670 is a wasteful number, since it uses less digits than its factorization.

20211996670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2021199674.

The product of its (nonzero) digits is 81648, while the sum is 43.

The spelling of 20211996670 in words is "twenty billion, two hundred eleven million, nine hundred ninety-six thousand, six hundred seventy".