20789070456 has 384 divisors, whose sum is σ = 69593333760. Its totient is φ = 5109753600.

The previous prime is 20789070437. The next prime is 20789070473. The reversal of 20789070456 is 65407098702.

20789070456 = T₃₄₄ + T₃₄₅ + ... + T₄₉₉₆.

It is a congruent number.

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, 18847201 + ... + 18848303.

It is an arithmetic number, because the mean of its divisors is an integer number (181232640).

Almost surely, 2^20789070456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20789070456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34796666880).

20789070456 is an abundant number, since it is smaller than the sum of its proper divisors (48804263304).

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

20789070456 is a wasteful number, since it uses less digits than its factorization.

20789070456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215 (or 1204 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 20789070456 in words is "twenty billion, seven hundred eighty-nine million, seventy thousand, four hundred fifty-six".