20660267088 has 120 divisors (see below), whose sum is σ = 58304695592. Its totient is φ = 6829277184.

The previous prime is 20660267021. The next prime is 20660267107. The reversal of 20660267088 is 88076206602.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3128388624 + 17531878464 = 55932^2 + 132408^2 .

It is a super-2 number, since 2×20660267088² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10365420 + ... + 10367412.

Almost surely, 2^20660267088 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 20660267088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29152347796).

20660267088 is an abundant number, since it is smaller than the sum of its proper divisors (37644428504).

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

20660267088 is a wasteful number, since it uses less digits than its factorization.

20660267088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2573 (or 2564 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 20660267088 in words is "twenty billion, six hundred sixty million, two hundred sixty-seven thousand, eighty-eight".