20465312250 has 32 divisors (see below), whose sum is σ = 51081421248. Its totient is φ = 5457416400.

The previous prime is 20465312233. The next prime is 20465312279. The reversal of 20465312250 is 5221356402.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13642792 + ... + 13644291.

It is an arithmetic number, because the mean of its divisors is an integer number (1596294414).

Almost surely, 2^20465312250 is an apocalyptic number.

20465312250 is an abundant number, since it is smaller than the sum of its proper divisors (30616108998).

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

20465312250 is a wasteful number, since it uses less digits than its factorization.

20465312250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27287103 (or 27287093 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 20465312250 its reverse (5221356402), we get a palindrome (25686668652).

The spelling of 20465312250 in words is "twenty billion, four hundred sixty-five million, three hundred twelve thousand, two hundred fifty".