21403159958 has 16 divisors (see below), whose sum is σ = 32863658256. Its totient is φ = 10448793600.

The previous prime is 21403159871. The next prime is 21403159961. The reversal of 21403159958 is 85995130412.

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, 191558 + ... + 281958.

It is an arithmetic number, because the mean of its divisors is an integer number (2053978641).

Almost surely, 2^21403159958 is an apocalyptic number.

21403159958 is a deficient number, since it is larger than the sum of its proper divisors (11460498298).

21403159958 is a wasteful number, since it uses less digits than its factorization.

21403159958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93199.

The product of its (nonzero) digits is 388800, while the sum is 47.

The spelling of 21403159958 in words is "twenty-one billion, four hundred three million, one hundred fifty-nine thousand, nine hundred fifty-eight".