21420343040030 has 192 divisors, whose sum is σ = 44415253048320. Its totient is φ = 7418249879040.

The previous prime is 21420343040021. The next prime is 21420343040081. The reversal of 21420343040030 is 3004034302412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6956914031 + ... + 6956917109.

It is an arithmetic number, because the mean of its divisors is an integer number (231329442960).

Almost surely, 2^{21420343040030} is an apocalyptic number.

21420343040030 is an abundant number, since it is smaller than the sum of its proper divisors (22994910008290).

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

21420343040030 is a wasteful number, since it uses less digits than its factorization.

21420343040030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4135 (or 4124 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 21420343040030 its reverse (3004034302412), we get a palindrome (24424377342442).

The spelling of 21420343040030 in words is "twenty-one trillion, four hundred twenty billion, three hundred forty-three million, forty thousand, thirty".