20202620640634 has 8 divisors (see below), whose sum is σ = 30489844648320. Its totient is φ = 10039339091196.

The previous prime is 20202620640619. The next prime is 20202620640661. The reversal of 20202620640634 is 43604602620202.

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

It is a junction number, because it is equal to n+sod(n) for n = 20202620640593 and 20202620640602.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30985614154 + ... + 30985614805.

It is an arithmetic number, because the mean of its divisors is an integer number (3811230581040).

Almost surely, 2^{20202620640634} is an apocalyptic number.

20202620640634 is a deficient number, since it is larger than the sum of its proper divisors (10287224007686).

20202620640634 is a wasteful number, since it uses less digits than its factorization.

20202620640634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61971229124.

The product of its (nonzero) digits is 165888, while the sum is 37.

The spelling of 20202620640634 in words is "twenty trillion, two hundred two billion, six hundred twenty million, six hundred forty thousand, six hundred thirty-four".