21430210344100 has 72 divisors (see below), whose sum is σ = 46655699109768. Its totient is φ = 8544043622400.

The previous prime is 21430210344079. The next prime is 21430210344157. The reversal of 21430210344100 is 144301203412.

It can be written as a sum of positive squares in 12 ways, for example, as 12162070357056 + 9268139987044 = 3487416^2 + 3044362^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 785522460 + ... + 785549740.

It is an arithmetic number, because the mean of its divisors is an integer number (647995820969).

Almost surely, 2^{21430210344100} is an apocalyptic number.

21430210344100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21430210344100 is an abundant number, since it is smaller than the sum of its proper divisors (25225488765668).

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

21430210344100 is a wasteful number, since it uses less digits than its factorization.

21430210344100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52705 (or 52698 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21430210344100 its reverse (144301203412), we get a palindrome (21574511547512).

The spelling of 21430210344100 in words is "twenty-one trillion, four hundred thirty billion, two hundred ten million, three hundred forty-four thousand, one hundred".