20307492357 has 8 divisors (see below), whose sum is σ = 27083913120. Its totient is φ = 13534699920.

The previous prime is 20307492343. The next prime is 20307492383. The reversal of 20307492357 is 75329470302.

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

It is not a de Polignac number, because 20307492357 - 2¹⁰ = 20307491333 is a prime.

It is a super-2 number, since 2×20307492357² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20307496357) 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, 893994 + ... + 916427.

It is an arithmetic number, because the mean of its divisors is an integer number (3385489140).

Almost surely, 2^20307492357 is an apocalyptic number.

It is an amenable number.

20307492357 is a deficient number, since it is larger than the sum of its proper divisors (6776420763).

20307492357 is a wasteful number, since it uses less digits than its factorization.

20307492357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1814163.

The product of its (nonzero) digits is 317520, while the sum is 42.

The spelling of 20307492357 in words is "twenty billion, three hundred seven million, four hundred ninety-two thousand, three hundred fifty-seven".