20261619100 has 36 divisors (see below), whose sum is σ = 44797304664. Its totient is φ = 7951727680.

The previous prime is 20261619097. The next prime is 20261619121. The reversal of 20261619100 is 191616202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1906174 + ... + 1916773.

It is an arithmetic number, because the mean of its divisors is an integer number (1244369574).

Almost surely, 2^20261619100 is an apocalyptic number.

20261619100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20261619100 is an abundant number, since it is smaller than the sum of its proper divisors (24535685564).

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

20261619100 is a wasteful number, since it uses less digits than its factorization.

20261619100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3823014 (or 3823007 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The spelling of 20261619100 in words is "twenty billion, two hundred sixty-one million, six hundred nineteen thousand, one hundred".