20257187323320 has 64 divisors (see below), whose sum is σ = 67523957748000. Its totient is φ = 5401916619264.

The previous prime is 20257187323309. The next prime is 20257187323333. The reversal of 20257187323320 is 2332378175202.

20257187323320 is a `hidden beast` number, since 2 + 0 + 2 + 571 + 8 + 73 + 2 + 3 + 3 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9378326385 + ... + 9378328544.

Almost surely, 2^{20257187323320} is an apocalyptic number.

20257187323320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20257187323320 is an abundant number, since it is smaller than the sum of its proper divisors (47266770424680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20257187323320 is a wasteful number, since it uses less digits than its factorization.

20257187323320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18756654949 (or 18756654939 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The spelling of 20257187323320 in words is "twenty trillion, two hundred fifty-seven billion, one hundred eighty-seven million, three hundred twenty-three thousand, three hundred twenty".