21072052414 has 12 divisors (see below), whose sum is σ = 36768581424. Its totient is φ = 9030879564.

The previous prime is 21072052411. The next prime is 21072052451. The reversal of 21072052414 is 41425027012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21072052411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 107510374 + ... + 107510569.

It is an arithmetic number, because the mean of its divisors is an integer number (3064048452).

Almost surely, 2^21072052414 is an apocalyptic number.

21072052414 is a deficient number, since it is larger than the sum of its proper divisors (15696529010).

21072052414 is a wasteful number, since it uses less digits than its factorization.

21072052414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215020959 (or 215020952 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

Adding to 21072052414 its reverse (41425027012), we get a palindrome (62497079426).

The spelling of 21072052414 in words is "twenty-one billion, seventy-two million, fifty-two thousand, four hundred fourteen".