20090146890 has 32 divisors (see below), whose sum is σ = 52599658176. Its totient is φ = 4870338560.

The previous prime is 20090146889. The next prime is 20090146961. The reversal of 20090146890 is 9864109002.

It is a super-2 number, since 2×20090146890² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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, 30439287 + ... + 30439946.

It is an arithmetic number, because the mean of its divisors is an integer number (1643739318).

Almost surely, 2^20090146890 is an apocalyptic number.

20090146890 is an abundant number, since it is smaller than the sum of its proper divisors (32509511286).

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

20090146890 is a wasteful number, since it uses less digits than its factorization.

20090146890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60879254.

The product of its (nonzero) digits is 31104, while the sum is 39.

The spelling of 20090146890 in words is "twenty billion, ninety million, one hundred forty-six thousand, eight hundred ninety".