20611328890 has 16 divisors (see below), whose sum is σ = 37963192608. Its totient is φ = 8052798096.

The previous prime is 20611328873. The next prime is 20611328893. The reversal of 20611328890 is 9882311602.

It is a super-2 number, since 2×20611328890² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20611328893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23966232 + ... + 23967091.

It is an arithmetic number, because the mean of its divisors is an integer number (2372699538).

Almost surely, 2^20611328890 is an apocalyptic number.

20611328890 is a deficient number, since it is larger than the sum of its proper divisors (17351863718).

20611328890 is a wasteful number, since it uses less digits than its factorization.

20611328890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47933373.

The product of its (nonzero) digits is 41472, while the sum is 40.

The spelling of 20611328890 in words is "twenty billion, six hundred eleven million, three hundred twenty-eight thousand, eight hundred ninety".