21466953437 has 8 divisors (see below), whose sum is σ = 21623155200. Its totient is φ = 21310913680.

The previous prime is 21466953427. The next prime is 21466953449. The reversal of 21466953437 is 73435966412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21466953437 - 2¹⁴ = 21466937053 is a prime.

It is a super-2 number, since 2×21466953437² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21466953427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232112 + ... + 311142.

It is an arithmetic number, because the mean of its divisors is an integer number (2702894400).

Almost surely, 2^21466953437 is an apocalyptic number.

It is an amenable number.

21466953437 is a deficient number, since it is larger than the sum of its proper divisors (156201763).

21466953437 is a wasteful number, since it uses less digits than its factorization.

21466953437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81003.

The product of its digits is 3265920, while the sum is 50.

The spelling of 21466953437 in words is "twenty-one billion, four hundred sixty-six million, nine hundred fifty-three thousand, four hundred thirty-seven".