21400420310 has 16 divisors (see below), whose sum is σ = 38522865600. Its totient is φ = 8559699456.

The previous prime is 21400420273. The next prime is 21400420337. The reversal of 21400420310 is 1302400412.

It is a super-2 number, since 2×21400420310² (a number of 21 digits) contains 22 as substring.

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, 179126 + ... + 273654.

It is an arithmetic number, because the mean of its divisors is an integer number (2407679100).

Almost surely, 2^21400420310 is an apocalyptic number.

21400420310 is a deficient number, since it is larger than the sum of its proper divisors (17122445290).

21400420310 is a wasteful number, since it uses less digits than its factorization.

21400420310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117175.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21400420310 its reverse (1302400412), we get a palindrome (22702820722).

The spelling of 21400420310 in words is "twenty-one billion, four hundred million, four hundred twenty thousand, three hundred ten".