20267634880 has 56 divisors (see below), whose sum is σ = 48335824080. Its totient is φ = 8094704640.

The previous prime is 20267634857. The next prime is 20267634883. The reversal of 20267634880 is 8843676202.

It is a super-2 number, since 2×20267634880² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20267634880.

It is not an unprimeable number, because it can be changed into a prime (20267634883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163611 + ... + 259429.

Almost surely, 2^20267634880 is an apocalyptic number.

20267634880 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 20267634880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24167912040).

20267634880 is an abundant number, since it is smaller than the sum of its proper divisors (28068189200).

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

20267634880 is an equidigital number, since it uses as much as digits as its factorization.

20267634880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96497 (or 96487 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 46.

The spelling of 20267634880 in words is "twenty billion, two hundred sixty-seven million, six hundred thirty-four thousand, eight hundred eighty".