19770220993 has 8 divisors (see below), whose sum is σ = 20812459520. Its totient is φ = 18728152560.

The previous prime is 19770220973. The next prime is 19770220999. The reversal of 19770220993 is 39902207791.

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

It is a de Polignac number, because none of the positive numbers 2^k-19770220993 is a prime.

It is a super-2 number, since 2×19770220993² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19770220999) 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, 246496 + ... + 316702.

It is an arithmetic number, because the mean of its divisors is an integer number (2601557440).

Almost surely, 2^19770220993 is an apocalyptic number.

It is an amenable number.

19770220993 is a deficient number, since it is larger than the sum of its proper divisors (1042238527).

19770220993 is a wasteful number, since it uses less digits than its factorization.

19770220993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85047.

The product of its (nonzero) digits is 428652, while the sum is 49.

The spelling of 19770220993 in words is "nineteen billion, seven hundred seventy million, two hundred twenty thousand, nine hundred ninety-three".