20162120997 has 8 divisors (see below), whose sum is σ = 28297713760. Its totient is φ = 12733971120.

The previous prime is 20162120977. The next prime is 20162120999. The reversal of 20162120997 is 79902126102.

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

It is not a de Polignac number, because 20162120997 - 2²⁸ = 19893685541 is a prime.

It is a super-2 number, since 2×20162120997² (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 (20162120999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176860654 + ... + 176860767.

It is an arithmetic number, because the mean of its divisors is an integer number (3537214220).

Almost surely, 2^20162120997 is an apocalyptic number.

It is an amenable number.

20162120997 is a deficient number, since it is larger than the sum of its proper divisors (8135592763).

20162120997 is a wasteful number, since it uses less digits than its factorization.

20162120997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353721443.

The product of its (nonzero) digits is 27216, while the sum is 39.

The spelling of 20162120997 in words is "twenty billion, one hundred sixty-two million, one hundred twenty thousand, nine hundred ninety-seven".