20662403085720 has 160 divisors (see below), whose sum is σ = 75762144778320. Its totient is φ = 5009067406080.

The previous prime is 20662403085661. The next prime is 20662403085763. The reversal of 20662403085720 is 2758030426602.

20662403085720 is a `hidden beast` number, since 2 + 0 + 6 + 6 + 2 + 40 + 30 + 8 + 572 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 289840947 + ... + 289912226.

Almost surely, 2^{20662403085720} is an apocalyptic number.

20662403085720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20662403085720 is an abundant number, since it is smaller than the sum of its proper divisors (55099741692600).

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

20662403085720 is a wasteful number, since it uses less digits than its factorization.

20662403085720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579753207 (or 579753194 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 45.

The spelling of 20662403085720 in words is "twenty trillion, six hundred sixty-two billion, four hundred three million, eighty-five thousand, seven hundred twenty".