20734896780 has 120 divisors (see below), whose sum is σ = 70049759472. Its totient is φ = 5103969408.

The previous prime is 20734896737. The next prime is 20734896781. The reversal of 20734896780 is 8769843702.

20734896780 is a `hidden beast` number, since 20 + 7 + 3 + 489 + 67 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (20734896781) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 471222 + ... + 513341.

Almost surely, 2^20734896780 is an apocalyptic number.

20734896780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20734896780 is an abundant number, since it is smaller than the sum of its proper divisors (49314862692).

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

20734896780 is a wasteful number, since it uses less digits than its factorization.

20734896780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984597 (or 984586 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 20734896780 in words is "twenty billion, seven hundred thirty-four million, eight hundred ninety-six thousand, seven hundred eighty".