20551050450 has 144 divisors (see below), whose sum is σ = 63274301376. Its totient is φ = 4684521600.

The previous prime is 20551050409. The next prime is 20551050469. The reversal of 20551050450 is 5405015502.

20551050450 is a `hidden beast` number, since 20 + 551 + 0 + 50 + 45 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1166205 + ... + 1183695.

Almost surely, 2^20551050450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20551050450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31637150688).

20551050450 is an abundant number, since it is smaller than the sum of its proper divisors (42723250926).

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

20551050450 is a wasteful number, since it uses less digits than its factorization.

20551050450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17889 (or 17881 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

Adding to 20551050450 its reverse (5405015502), we get a palindrome (25956065952).

The spelling of 20551050450 in words is "twenty billion, five hundred fifty-one million, fifty thousand, four hundred fifty".