20733716440 has 32 divisors (see below), whose sum is σ = 46722361680. Its totient is φ = 8280775552.

The previous prime is 20733716429. The next prime is 20733716467. The reversal of 20733716440 is 4461733702.

It is a self number, because there is not a number n which added to its sum of digits gives 20733716440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370774 + ... + 423013.

Almost surely, 2^20733716440 is an apocalyptic number.

20733716440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20733716440 is an abundant number, since it is smaller than the sum of its proper divisors (25988645240).

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

20733716440 is a wasteful number, since it uses less digits than its factorization.

20733716440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794451 (or 794447 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 37.

The spelling of 20733716440 in words is "twenty billion, seven hundred thirty-three million, seven hundred sixteen thousand, four hundred forty".