20770247960 has 128 divisors (see below), whose sum is σ = 58334307840. Its totient is φ = 6466099200.

The previous prime is 20770247921. The next prime is 20770247977. The reversal of 20770247960 is 6974207702.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2913200 + ... + 2920320.

It is an arithmetic number, because the mean of its divisors is an integer number (455736780).

Almost surely, 2^20770247960 is an apocalyptic number.

20770247960 is a gapful number since it is divisible by the number (20) 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 20770247960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29167153920).

20770247960 is an abundant number, since it is smaller than the sum of its proper divisors (37564059880).

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

20770247960 is a wasteful number, since it uses less digits than its factorization.

20770247960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8097 (or 8093 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 44.

The spelling of 20770247960 in words is "twenty billion, seven hundred seventy million, two hundred forty-seven thousand, nine hundred sixty".