20203625842687 has 4 divisors (see below), whose sum is σ = 23089858105936. Its totient is φ = 17317393579440.

The previous prime is 20203625842613. The next prime is 20203625842693. The reversal of 20203625842687 is 78624852630202.

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 20203625842687 - 2²³ = 20203617454079 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 (20203625842087) 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, 1443116131614 + ... + 1443116131627.

It is an arithmetic number, because the mean of its divisors is an integer number (5772464526484).

Almost surely, 2^{20203625842687} is an apocalyptic number.

20203625842687 is a deficient number, since it is larger than the sum of its proper divisors (2886232263249).

20203625842687 is an equidigital number, since it uses as much as digits as its factorization.

20203625842687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2886232263248.

The product of its (nonzero) digits is 15482880, while the sum is 55.

The spelling of 20203625842687 in words is "twenty trillion, two hundred three billion, six hundred twenty-five million, eight hundred forty-two thousand, six hundred eighty-seven".