21011042414 has 4 divisors (see below), whose sum is σ = 31516563624. Its totient is φ = 10505521206.

The previous prime is 21011042357. The next prime is 21011042419. The reversal of 21011042414 is 41424011012.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011042419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5252760602 + ... + 5252760605.

It is an arithmetic number, because the mean of its divisors is an integer number (7879140906).

Almost surely, 2^21011042414 is an apocalyptic number.

21011042414 is a deficient number, since it is larger than the sum of its proper divisors (10505521210).

21011042414 is a wasteful number, since it uses less digits than its factorization.

21011042414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10505521209.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21011042414 its reverse (41424011012), we get a palindrome (62435053426).

The spelling of 21011042414 in words is "twenty-one billion, eleven million, forty-two thousand, four hundred fourteen".