20357243706 has 8 divisors (see below), whose sum is σ = 40714487424. Its totient is φ = 6785747900.

The previous prime is 20357243689. The next prime is 20357243723. The reversal of 20357243706 is 60734275302.

It is an interprime number because it is at equal distance from previous prime (20357243689) and next prime (20357243723).

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

20357243706 is an admirable number.

It is a super-2 number, since 2×20357243706² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1696436970 + ... + 1696436981.

It is an arithmetic number, because the mean of its divisors is an integer number (5089310928).

Almost surely, 2^20357243706 is an apocalyptic number.

20357243706 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20357243706 is a wasteful number, since it uses less digits than its factorization.

20357243706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3392873956.

The product of its (nonzero) digits is 211680, while the sum is 39.

The spelling of 20357243706 in words is "twenty billion, three hundred fifty-seven million, two hundred forty-three thousand, seven hundred six".