21401314234 has 16 divisors (see below), whose sum is σ = 32923426536. Its totient is φ = 10427449600.

The previous prime is 21401314223. The next prime is 21401314243. The reversal of 21401314234 is 43241310412.

It can be written as a sum of positive squares in 4 ways, for example, as 13436287225 + 7965027009 = 115915^2 + 89247^2 .

It is a super-2 number, since 2×21401314234² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21401314199 and 21401314208.

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, 81997 + ... + 222544.

Almost surely, 2^21401314234 is an apocalyptic number.

21401314234 is a deficient number, since it is larger than the sum of its proper divisors (11522112302).

21401314234 is a wasteful number, since it uses less digits than its factorization.

21401314234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305441.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21401314234 its reverse (43241310412), we get a palindrome (64642624646).

The spelling of 21401314234 in words is "twenty-one billion, four hundred one million, three hundred fourteen thousand, two hundred thirty-four".