20315256733 has 8 divisors (see below), whose sum is σ = 20796576416. Its totient is φ = 19834340400.

The previous prime is 20315256673. The next prime is 20315256749. The reversal of 20315256733 is 33765251302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20315256733 is a prime.

It is a super-2 number, since 2×20315256733² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20315256692 and 20315256701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20315256763) 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, 2323 + ... + 201583.

It is an arithmetic number, because the mean of its divisors is an integer number (2599572052).

Almost surely, 2^20315256733 is an apocalyptic number.

It is an amenable number.

20315256733 is a deficient number, since it is larger than the sum of its proper divisors (481319683).

20315256733 is a wasteful number, since it uses less digits than its factorization.

20315256733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201675.

The product of its (nonzero) digits is 113400, while the sum is 37.

The spelling of 20315256733 in words is "twenty billion, three hundred fifteen million, two hundred fifty-six thousand, seven hundred thirty-three".