20292788890 has 32 divisors (see below), whose sum is σ = 39918557376. Its totient is φ = 7366066560.

The previous prime is 20292788881. The next prime is 20292788891. The reversal of 20292788890 is 9888729202.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is not an unprimeable number, because it can be changed into a prime (20292788891) 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, 101907 + ... + 225766.

It is an arithmetic number, because the mean of its divisors is an integer number (1247454918).

Almost surely, 2^20292788890 is an apocalyptic number.

20292788890 is a deficient number, since it is larger than the sum of its proper divisors (19625768486).

20292788890 is a wasteful number, since it uses less digits than its factorization.

20292788890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328254.

The product of its (nonzero) digits is 2322432, while the sum is 55.

The spelling of 20292788890 in words is "twenty billion, two hundred ninety-two million, seven hundred eighty-eight thousand, eight hundred ninety".