20265518000 has 240 divisors, whose sum is σ = 61391008224. Its totient is φ = 6413299200.

The previous prime is 20265517991. The next prime is 20265518029. The reversal of 20265518000 is 81556202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1266047 + ... + 1281953.

Almost surely, 2^20265518000 is an apocalyptic number.

20265518000 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 20265518000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30695504112).

20265518000 is an abundant number, since it is smaller than the sum of its proper divisors (41125490224).

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

20265518000 is a wasteful number, since it uses less digits than its factorization.

20265518000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15957 (or 15934 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The spelling of 20265518000 in words is "twenty billion, two hundred sixty-five million, five hundred eighteen thousand".