20320620149 has 8 divisors (see below), whose sum is σ = 21660355800. Its totient is φ = 18996929536.

The previous prime is 20320620143. The next prime is 20320620163. The reversal of 20320620149 is 94102602302.

It can be written as a sum of positive squares in 4 ways, for example, as 117649 + 20320502500 = 343^2 + 142550^2 .

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 20320620149 - 2¹⁶ = 20320554613 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 (20320620143) 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, 4008644 + ... + 4013709.

It is an arithmetic number, because the mean of its divisors is an integer number (2707544475).

Almost surely, 2^20320620149 is an apocalyptic number.

It is an amenable number.

20320620149 is a deficient number, since it is larger than the sum of its proper divisors (1339735651).

20320620149 is a wasteful number, since it uses less digits than its factorization.

20320620149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8022519.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 20320620149 in words is "twenty billion, three hundred twenty million, six hundred twenty thousand, one hundred forty-nine".