20703021678 has 48 divisors (see below), whose sum is σ = 45920238000. Its totient is φ = 6738992640.

The previous prime is 20703021667. The next prime is 20703021797. The reversal of 20703021678 is 87612030702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84798 + ... + 220446.

It is an arithmetic number, because the mean of its divisors is an integer number (956671625).

Almost surely, 2^20703021678 is an apocalyptic number.

20703021678 is an abundant number, since it is smaller than the sum of its proper divisors (25217216322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20703021678 is a wasteful number, since it uses less digits than its factorization.

20703021678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135857 (or 135854 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The spelling of 20703021678 in words is "twenty billion, seven hundred three million, twenty-one thousand, six hundred seventy-eight".