20016786240 has 168 divisors, whose sum is σ = 75108559968. Its totient is φ = 4852546560.

The previous prime is 20016786233. The next prime is 20016786313. The reversal of 20016786240 is 4268761002.

20016786240 is a `hidden beast` number, since 20 + 0 + 1 + 6 + 7 + 8 + 624 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 20016786195 and 20016786204.

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, 284242 + ... + 347601.

Almost surely, 2^20016786240 is an apocalyptic number.

20016786240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20016786240 is an abundant number, since it is smaller than the sum of its proper divisors (55091773728).

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

20016786240 is a wasteful number, since it uses less digits than its factorization.

20016786240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631877 (or 631864 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The spelling of 20016786240 in words is "twenty billion, sixteen million, seven hundred eighty-six thousand, two hundred forty".