21198429659 has 8 divisors (see below), whose sum is σ = 23155485552. Its totient is φ = 19246361440.

The previous prime is 21198429643. The next prime is 21198429673. The reversal of 21198429659 is 95692489112.

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 21198429659 - 2⁴ = 21198429643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21198429689) 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, 1238024 + ... + 1255029.

It is an arithmetic number, because the mean of its divisors is an integer number (2894435694).

Almost surely, 2^21198429659 is an apocalyptic number.

21198429659 is a deficient number, since it is larger than the sum of its proper divisors (1957055893).

21198429659 is a wasteful number, since it uses less digits than its factorization.

21198429659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2493837.

The product of its digits is 2799360, while the sum is 56.

The spelling of 21198429659 in words is "twenty-one billion, one hundred ninety-eight million, four hundred twenty-nine thousand, six hundred fifty-nine".