20357250215 has 8 divisors (see below), whose sum is σ = 24434178768. Its totient is φ = 16282147840.

The previous prime is 20357250211. The next prime is 20357250227. The reversal of 20357250215 is 51205275302.

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

It is not a de Polignac number, because 20357250215 - 2² = 20357250211 is a prime.

It is a super-2 number, since 2×20357250215² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20357250211) 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, 431897 + ... + 476706.

It is an arithmetic number, because the mean of its divisors is an integer number (3054272346).

Almost surely, 2^20357250215 is an apocalyptic number.

20357250215 is a deficient number, since it is larger than the sum of its proper divisors (4076928553).

20357250215 is an equidigital number, since it uses as much as digits as its factorization.

20357250215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913089.

The product of its (nonzero) digits is 21000, while the sum is 32.

The spelling of 20357250215 in words is "twenty billion, three hundred fifty-seven million, two hundred fifty thousand, two hundred fifteen".