21020243342030 has 16 divisors (see below), whose sum is σ = 37836493561584. Its totient is φ = 8408084993280.

The previous prime is 21020243342027. The next prime is 21020243342057. The reversal of 21020243342030 is 3024334202012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9115325 + ... + 11186135.

It is an arithmetic number, because the mean of its divisors is an integer number (2364780847599).

Almost surely, 2^{21020243342030} is an apocalyptic number.

21020243342030 is a deficient number, since it is larger than the sum of its proper divisors (16816250219554).

21020243342030 is a wasteful number, since it uses less digits than its factorization.

21020243342030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3085891.

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

Adding to 21020243342030 its reverse (3024334202012), we get a palindrome (24044577544042).

The spelling of 21020243342030 in words is "twenty-one trillion, twenty billion, two hundred forty-three million, three hundred forty-two thousand, thirty".