21020214344 has 16 divisors (see below), whose sum is σ = 39506972400. Its totient is φ = 10485021712.

The previous prime is 21020214343. The next prime is 21020214401. The reversal of 21020214344 is 44341202012.

It is a super-2 number, since 2×21020214344² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21020214343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3132122 + ... + 3138825.

It is an arithmetic number, because the mean of its divisors is an integer number (2469185775).

Almost surely, 2^21020214344 is an apocalyptic number.

It is an amenable number.

21020214344 is a deficient number, since it is larger than the sum of its proper divisors (18486758056).

21020214344 is a wasteful number, since it uses less digits than its factorization.

21020214344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6271372 (or 6271368 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 21020214344 its reverse (44341202012), we get a palindrome (65361416356).

The spelling of 21020214344 in words is "twenty-one billion, twenty million, two hundred fourteen thousand, three hundred forty-four".