20485555510 has 64 divisors (see below), whose sum is σ = 42425856000. Its totient is φ = 6976392192.

The previous prime is 20485555477. The next prime is 20485555523. The reversal of 20485555510 is 1555558402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12940179 + ... + 12941761.

It is an arithmetic number, because the mean of its divisors is an integer number (662904000).

Almost surely, 2^20485555510 is an apocalyptic number.

20485555510 is an abundant number, since it is smaller than the sum of its proper divisors (21940300490).

20485555510 is a wasteful number, since it uses less digits than its factorization.

20485555510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2725.

The product of its (nonzero) digits is 200000, while the sum is 40.

The spelling of 20485555510 in words is "twenty billion, four hundred eighty-five million, five hundred fifty-five thousand, five hundred ten".