20144593215 has 64 divisors (see below), whose sum is σ = 36391265280. Its totient is φ = 10570815360.

The previous prime is 20144593199. The next prime is 20144593223. The reversal of 20144593215 is 51239544102.

20144593215 is a `hidden beast` number, since 2 + 0 + 1 + 44 + 593 + 21 + 5 = 666.

It is not a de Polignac number, because 20144593215 - 2⁴ = 20144593199 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20144593215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5394489 + ... + 5398221.

It is an arithmetic number, because the mean of its divisors is an integer number (568613520).

Almost surely, 2^20144593215 is an apocalyptic number.

20144593215 is a deficient number, since it is larger than the sum of its proper divisors (16246672065).

20144593215 is a wasteful number, since it uses less digits than its factorization.

20144593215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4381 (or 4375 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 20144593215 in words is "twenty billion, one hundred forty-four million, five hundred ninety-three thousand, two hundred fifteen".