20343664215025 has 12 divisors (see below), whose sum is σ = 25226646074352. Its totient is φ = 16274607212240.

The previous prime is 20343664215001. The next prime is 20343664215041. The reversal of 20343664215025 is 52051246634302.

It is a de Polignac number, because none of the positive numbers 2^k-20343664215025 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6819739 + ... + 9337888.

It is an arithmetic number, because the mean of its divisors is an integer number (2102220506196).

Almost surely, 2^{20343664215025} is an apocalyptic number.

20343664215025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20343664215025 is a deficient number, since it is larger than the sum of its proper divisors (4882981859327).

20343664215025 is a wasteful number, since it uses less digits than its factorization.

20343664215025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16208000 (or 16207995 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 43.

The spelling of 20343664215025 in words is "twenty trillion, three hundred forty-three billion, six hundred sixty-four million, two hundred fifteen thousand, twenty-five".