20534943744 has 280 divisors, whose sum is σ = 70127365968. Its totient is φ = 5865799680.

The previous prime is 20534943731. The next prime is 20534943769. The reversal of 20534943744 is 44734943502.

20534943744 is a `hidden beast` number, since 2 + 0 + 534 + 9 + 43 + 74 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 20534943744.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4642654 + ... + 4647074.

Almost surely, 2^20534943744 is an apocalyptic number.

20534943744 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 20534943744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35063682984).

20534943744 is an abundant number, since it is smaller than the sum of its proper divisors (49592422224).

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

20534943744 is an frugal number, since it uses more digits than its factorization.

20534943744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4466 (or 4433 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 45.

The spelling of 20534943744 in words is "twenty billion, five hundred thirty-four million, nine hundred forty-three thousand, seven hundred forty-four".