21003240414 has 32 divisors (see below), whose sum is σ = 47618686080. Its totient is φ = 6122401632.

The previous prime is 21003240371. The next prime is 21003240421. The reversal of 21003240414 is 41404230012.

It is a super-2 number, since 2×21003240414² (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 15 ways as a sum of consecutive naturals, for example, 7084632 + ... + 7087595.

It is an arithmetic number, because the mean of its divisors is an integer number (1488083940).

Almost surely, 2^21003240414 is an apocalyptic number.

21003240414 is an abundant number, since it is smaller than the sum of its proper divisors (26615445666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21003240414 is a wasteful number, since it uses less digits than its factorization.

21003240414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14172264.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21003240414 its reverse (41404230012), we get a palindrome (62407470426).

The spelling of 21003240414 in words is "twenty-one billion, three million, two hundred forty thousand, four hundred fourteen".