21435630015 has 8 divisors (see below), whose sum is σ = 34297008048. Its totient is φ = 11432336000.

The previous prime is 21435629981. The next prime is 21435630023. The reversal of 21435630015 is 51003653412.

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

It is not a de Polignac number, because 21435630015 - 2¹⁷ = 21435498943 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 714520986 + ... + 714521015.

It is an arithmetic number, because the mean of its divisors is an integer number (4287126006).

Almost surely, 2^21435630015 is an apocalyptic number.

21435630015 is a deficient number, since it is larger than the sum of its proper divisors (12861378033).

21435630015 is a wasteful number, since it uses less digits than its factorization.

21435630015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1429042009.

The product of its (nonzero) digits is 10800, while the sum is 30.

The spelling of 21435630015 in words is "twenty-one billion, four hundred thirty-five million, six hundred thirty thousand, fifteen".