20450000190 has 16 divisors (see below), whose sum is σ = 49080000528. Its totient is φ = 5453333376.

The previous prime is 20450000167. The next prime is 20450000191. The reversal of 20450000190 is 9100005402.

It is a super-2 number, since 2×20450000190² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20450000191) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 340833307 + ... + 340833366.

It is an arithmetic number, because the mean of its divisors is an integer number (3067500033).

Almost surely, 2^20450000190 is an apocalyptic number.

20450000190 is an abundant number, since it is smaller than the sum of its proper divisors (28630000338).

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

20450000190 is a wasteful number, since it uses less digits than its factorization.

20450000190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681666683.

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 20450000190 its reverse (9100005402), we get a palindrome (29550005592).

The spelling of 20450000190 in words is "twenty billion, four hundred fifty million, one hundred ninety", and thus it is an aban number.