20551150000 has 120 divisors (see below), whose sum is σ = 50144134320. Its totient is φ = 8158560000.

The previous prime is 20551149973. The next prime is 20551150027. The reversal of 20551150000 is 5115502.

It is an interprime number because it is at equal distance from previous prime (20551149973) and next prime (20551150027).

It is a self number, because there is not a number n which added to its sum of digits gives 20551150000.

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, 6948522 + ... + 6951478.

It is an arithmetic number, because the mean of its divisors is an integer number (417867786).

Almost surely, 2^20551150000 is an apocalyptic number.

20551150000 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 20551150000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25072067160).

20551150000 is an abundant number, since it is smaller than the sum of its proper divisors (29592984320).

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

20551150000 is an equidigital number, since it uses as much as digits as its factorization.

20551150000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3129 (or 3103 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 19.

Adding to 20551150000 its reverse (5115502), we get a palindrome (20556265502).

The spelling of 20551150000 in words is "twenty billion, five hundred fifty-one million, one hundred fifty thousand".