20357402189 has 8 divisors (see below), whose sum is σ = 21295490112. Its totient is φ = 19423729600.

The previous prime is 20357402171. The next prime is 20357402239. The reversal of 20357402189 is 98120475302.

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 20357402189 - 2¹⁶ = 20357336653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20357402119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1094399 + ... + 1112844.

It is an arithmetic number, because the mean of its divisors is an integer number (2661936264).

Almost surely, 2^20357402189 is an apocalyptic number.

It is an amenable number.

20357402189 is a deficient number, since it is larger than the sum of its proper divisors (938087923).

20357402189 is a wasteful number, since it uses less digits than its factorization.

20357402189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2207667.

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 20357402189 in words is "twenty billion, three hundred fifty-seven million, four hundred two thousand, one hundred eighty-nine".