21030402114 has 80 divisors (see below), whose sum is σ = 47532942072. Its totient is φ = 6949504512.

The previous prime is 21030402049. The next prime is 21030402119. The reversal of 21030402114 is 41120403012.

It can be written as a sum of positive squares in 4 ways, for example, as 17802230625 + 3228171489 = 133425^2 + 56817^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21030402119) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 12134392 + ... + 12136124.

Almost surely, 2^21030402114 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21030402114, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23766471036).

21030402114 is an abundant number, since it is smaller than the sum of its proper divisors (26502539958).

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

21030402114 is a wasteful number, since it uses less digits than its factorization.

21030402114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2353 (or 2344 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21030402114 its reverse (41120403012), we get a palindrome (62150805126).

The spelling of 21030402114 in words is "twenty-one billion, thirty million, four hundred two thousand, one hundred fourteen".