20190390854 has 32 divisors (see below), whose sum is σ = 30988391616. Its totient is φ = 9863377920.

The previous prime is 20190390853. The next prime is 20190390859. The reversal of 20190390854 is 45809309102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20190390853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20665214 + ... + 20666190.

It is an arithmetic number, because the mean of its divisors is an integer number (968387238).

Almost surely, 2^20190390854 is an apocalyptic number.

20190390854 is a deficient number, since it is larger than the sum of its proper divisors (10798000762).

20190390854 is a wasteful number, since it uses less digits than its factorization.

20190390854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000.

The product of its (nonzero) digits is 77760, while the sum is 41.

Adding to 20190390854 its reverse (45809309102), we get a palindrome (65999699956).

The spelling of 20190390854 in words is "twenty billion, one hundred ninety million, three hundred ninety thousand, eight hundred fifty-four".