20513464315 has 8 divisors (see below), whose sum is σ = 24618520080. Its totient is φ = 16409196192.

The previous prime is 20513464259. The next prime is 20513464327. The reversal of 20513464315 is 51346431502.

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-20513464315 is a prime.

It is a super-3 number, since 3×20513464315³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138009 + ... + 245098.

It is an arithmetic number, because the mean of its divisors is an integer number (3077315010).

Almost surely, 2^20513464315 is an apocalyptic number.

20513464315 is a deficient number, since it is larger than the sum of its proper divisors (4105055765).

20513464315 is a wasteful number, since it uses less digits than its factorization.

20513464315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393821.

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 20513464315 its reverse (51346431502), we get a palindrome (71859895817).

The spelling of 20513464315 in words is "twenty billion, five hundred thirteen million, four hundred sixty-four thousand, three hundred fifteen".