20387574167 has 4 divisors (see below), whose sum is σ = 20388416160. Its totient is φ = 20386732176.

The previous prime is 20387574157. The next prime is 20387574191. The reversal of 20387574167 is 76147578302.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20387574167 - 2²⁶ = 20320465303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20387574157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 383567 + ... + 433472.

It is an arithmetic number, because the mean of its divisors is an integer number (5097104040).

Almost surely, 2^20387574167 is an apocalyptic number.

20387574167 is a deficient number, since it is larger than the sum of its proper divisors (841993).

20387574167 is an equidigital number, since it uses as much as digits as its factorization.

20387574167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841992.

The product of its (nonzero) digits is 1975680, while the sum is 50.

The spelling of 20387574167 in words is "twenty billion, three hundred eighty-seven million, five hundred seventy-four thousand, one hundred sixty-seven".