20626861248 has 210 divisors, whose sum is σ = 71128126476. Its totient is φ = 5893316352.

The previous prime is 20626861207. The next prime is 20626861253. The reversal of 20626861248 is 84216862602.

20626861248 is a `hidden beast` number, since 2 + 0 + 6 + 26 + 8 + 612 + 4 + 8 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 213415 + ... + 294617.

Almost surely, 2^20626861248 is an apocalyptic number.

20626861248 is a gapful number since it is divisible by the number (28) 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 20626861248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35564063238).

20626861248 is an abundant number, since it is smaller than the sum of its proper divisors (50501265228).

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

20626861248 is an equidigital number, since it uses as much as digits as its factorization.

20626861248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81241 (or 81215 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The spelling of 20626861248 in words is "twenty billion, six hundred twenty-six million, eight hundred sixty-one thousand, two hundred forty-eight".