20661364110 has 32 divisors (see below), whose sum is σ = 50796722592. Its totient is φ = 5375313920.

The previous prime is 20661364067. The next prime is 20661364121. The reversal of 20661364110 is 1146316602.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8397699 + ... + 8400158.

It is an arithmetic number, because the mean of its divisors is an integer number (1587397581).

Almost surely, 2^20661364110 is an apocalyptic number.

20661364110 is an abundant number, since it is smaller than the sum of its proper divisors (30135358482).

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

20661364110 is a wasteful number, since it uses less digits than its factorization.

20661364110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16797908.

The product of its (nonzero) digits is 5184, while the sum is 30.

The spelling of 20661364110 in words is "twenty billion, six hundred sixty-one million, three hundred sixty-four thousand, one hundred ten".