21910485102 has 64 divisors (see below), whose sum is σ = 49650278400. Its totient is φ = 6385845600.

The previous prime is 21910485097. The next prime is 21910485143. The reversal of 21910485102 is 20158401912.

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 300649 + ... + 366347.

It is an arithmetic number, because the mean of its divisors is an integer number (775785600).

Almost surely, 2^21910485102 is an apocalyptic number.

21910485102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21910485102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24825139200).

21910485102 is an abundant number, since it is smaller than the sum of its proper divisors (27739793298).

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

21910485102 is a wasteful number, since it uses less digits than its factorization.

21910485102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65909.

The product of its (nonzero) digits is 5760, while the sum is 33.

The spelling of 21910485102 in words is "twenty-one billion, nine hundred ten million, four hundred eighty-five thousand, one hundred two".