20100204450 has 72 divisors (see below), whose sum is σ = 54031336788. Its totient is φ = 5357197440.

The previous prime is 20100204437. The next prime is 20100204463. The reversal of 20100204450 is 5440200102.

20100204450 is a `hidden beast` number, since 2 + 0 + 10 + 0 + 204 + 450 = 666.

It is an interprime number because it is at equal distance from previous prime (20100204437) and next prime (20100204463).

It can be written as a sum of positive squares in 6 ways, for example, as 12361659489 + 7738544961 = 111183^2 + 87969^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 912972 + ... + 934728.

Almost surely, 2^20100204450 is an apocalyptic number.

20100204450 is an abundant number, since it is smaller than the sum of its proper divisors (33931132338).

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

20100204450 is a wasteful number, since it uses less digits than its factorization.

20100204450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23828 (or 23820 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

Adding to 20100204450 its reverse (5440200102), we get a palindrome (25540404552).

The spelling of 20100204450 in words is "twenty billion, one hundred million, two hundred four thousand, four hundred fifty".