20502198703 has 8 divisors (see below), whose sum is σ = 23439685760. Its totient is φ = 17566862040.

The previous prime is 20502198617. The next prime is 20502198751. The reversal of 20502198703 is 30789120502.

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

It is not a de Polignac number, because 20502198703 - 2²¹ = 20500101551 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 (20502198793) 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, 517113 + ... + 555346.

It is an arithmetic number, because the mean of its divisors is an integer number (2929960720).

Almost surely, 2^20502198703 is an apocalyptic number.

20502198703 is a deficient number, since it is larger than the sum of its proper divisors (2937487057).

20502198703 is a wasteful number, since it uses less digits than its factorization.

20502198703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075197.

The product of its (nonzero) digits is 30240, while the sum is 37.

The spelling of 20502198703 in words is "twenty billion, five hundred two million, one hundred ninety-eight thousand, seven hundred three".