20755435668 has 48 divisors (see below), whose sum is σ = 52848875520. Its totient is φ = 6287519200.

The previous prime is 20755435637. The next prime is 20755435703. The reversal of 20755435668 is 86653455702.

It is a self number, because there is not a number n which added to its sum of digits gives 20755435668.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 419983 + ... + 466793.

It is an arithmetic number, because the mean of its divisors is an integer number (1101018240).

Almost surely, 2^20755435668 is an apocalyptic number.

It is an amenable number.

20755435668 is an abundant number, since it is smaller than the sum of its proper divisors (32093439852).

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

20755435668 is a wasteful number, since it uses less digits than its factorization.

20755435668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50188 (or 50186 counting only the distinct ones).

The product of its (nonzero) digits is 6048000, while the sum is 51.

The spelling of 20755435668 in words is "twenty billion, seven hundred fifty-five million, four hundred thirty-five thousand, six hundred sixty-eight".