20744471073690 has 1024 divisors, whose sum is σ = 71943075348480. Its totient is φ = 4137364500480.

The previous prime is 20744471073673. The next prime is 20744471073787. The reversal of 20744471073690 is 9637017444702.

It is a happy number.

20744471073690 is a `hidden beast` number, since 2 + 0 + 7 + 4 + 447 + 107 + 3 + 6 + 90 = 666.

It is a super-2 number, since 2×20744471073690² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 511 ways as a sum of consecutive naturals, for example, 4602720417 + ... + 4602724923.

It is an arithmetic number, because the mean of its divisors is an integer number (70256909520).

Almost surely, 2^{20744471073690} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20744471073690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35971537674240).

20744471073690 is an abundant number, since it is smaller than the sum of its proper divisors (51198604274790).

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

20744471073690 is a wasteful number, since it uses less digits than its factorization.

20744471073690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4724 (or 4718 counting only the distinct ones).

The product of its (nonzero) digits is 7112448, while the sum is 54.

The spelling of 20744471073690 in words is "twenty trillion, seven hundred forty-four billion, four hundred seventy-one million, seventy-three thousand, six hundred ninety".