21135411514 has 32 divisors (see below), whose sum is σ = 37157788800. Its totient is φ = 8827564032.

The previous prime is 21135411509. The next prime is 21135411527. The reversal of 21135411514 is 41511453112.

It is a happy number.

It is a super-2 number, since 2×21135411514² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231202 + ... + 309394.

It is an arithmetic number, because the mean of its divisors is an integer number (1161180900).

Almost surely, 2^21135411514 is an apocalyptic number.

21135411514 is a deficient number, since it is larger than the sum of its proper divisors (16022377286).

21135411514 is a wasteful number, since it uses less digits than its factorization.

21135411514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78694.

The product of its digits is 2400, while the sum is 28.

Adding to 21135411514 its reverse (41511453112), we get a palindrome (62646864626).

The spelling of 21135411514 in words is "twenty-one billion, one hundred thirty-five million, four hundred eleven thousand, five hundred fourteen".