20745622819 has 8 divisors (see below), whose sum is σ = 20812425920. Its totient is φ = 20678927400.

The previous prime is 20745622817. The next prime is 20745622831. The reversal of 20745622819 is 91822654702.

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

It is a cyclic number.

It is not a de Polignac number, because 20745622819 - 2¹ = 20745622817 is a prime.

It is a super-2 number, since 2×20745622819² (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 (20745622817) 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, 368272 + ... + 420850.

It is an arithmetic number, because the mean of its divisors is an integer number (2601553240).

Almost surely, 2^20745622819 is an apocalyptic number.

20745622819 is a deficient number, since it is larger than the sum of its proper divisors (66803101).

20745622819 is an equidigital number, since it uses as much as digits as its factorization.

20745622819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53841.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 20745622819 in words is "twenty billion, seven hundred forty-five million, six hundred twenty-two thousand, eight hundred nineteen".