20284701551664 has 480 divisors, whose sum is σ = 61170663493632. Its totient is φ = 5777717299200.

The previous prime is 20284701551581. The next prime is 20284701551683. The reversal of 20284701551664 is 46615510748202.

It is a super-2 number, since 2×20284701551664² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4350137397 + ... + 4350142059.

Almost surely, 2^{20284701551664} is an apocalyptic number.

20284701551664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20284701551664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30585331746816).

20284701551664 is an abundant number, since it is smaller than the sum of its proper divisors (40885961941968).

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

20284701551664 is a wasteful number, since it uses less digits than its factorization.

20284701551664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5417 (or 5400 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 51.

The spelling of 20284701551664 in words is "twenty trillion, two hundred eighty-four billion, seven hundred one million, five hundred fifty-one thousand, six hundred sixty-four".