20312501552643 has 8 divisors (see below), whose sum is σ = 27085173989056. Its totient is φ = 13540748409000.

The previous prime is 20312501552621. The next prime is 20312501552657. The reversal of 20312501552643 is 34625510521302.

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

It is not a de Polignac number, because 20312501552643 - 2⁶ = 20312501552579 is a prime.

It is a super-2 number, since 2×20312501552643² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20312501557643) 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, 229771633 + ... + 229860018.

It is an arithmetic number, because the mean of its divisors is an integer number (3385646748632).

Almost surely, 2^{20312501552643} is an apocalyptic number.

20312501552643 is a deficient number, since it is larger than the sum of its proper divisors (6772672436413).

20312501552643 is a wasteful number, since it uses less digits than its factorization.

20312501552643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459646385.

The product of its (nonzero) digits is 216000, while the sum is 39.

The spelling of 20312501552643 in words is "twenty trillion, three hundred twelve billion, five hundred one million, five hundred fifty-two thousand, six hundred forty-three".