19977772363999 has 4 divisors (see below), whose sum is σ = 20230655558560. Its totient is φ = 19724889169440.

The previous prime is 19977772363993. The next prime is 19977772364167. The reversal of 19977772363999 is 99936327777991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19977772363999 - 2²¹ = 19977770266847 is a prime.

It is a super-2 number, since 2×19977772363999² (a number of 27 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 (19977772363993) 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, 126441597162 + ... + 126441597319.

It is an arithmetic number, because the mean of its divisors is an integer number (5057663889640).

Almost surely, 2^{19977772363999} is an apocalyptic number.

19977772363999 is a deficient number, since it is larger than the sum of its proper divisors (252883194561).

19977772363999 is an equidigital number, since it uses as much as digits as its factorization.

19977772363999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252883194560.

The product of its digits is 15311878092, while the sum is 88.

The spelling of 19977772363999 in words is "nineteen trillion, nine hundred seventy-seven billion, seven hundred seventy-two million, three hundred sixty-three thousand, nine hundred ninety-nine".