20735998 has 8 divisors (see below), whose sum is σ = 31133880. Its totient is φ = 10358040.

The previous prime is 20735969. The next prime is 20736017. The reversal of 20735998 is 89953702.

It is a happy number.

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

It is a super-2 number, since 2×20735998² = 859963226112008, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2028 + ... + 6751.

It is an arithmetic number, because the mean of its divisors is an integer number (3891735).

Almost surely, 2^20735998 is an apocalyptic number.

20735998 is a deficient number, since it is larger than the sum of its proper divisors (10397882).

20735998 is a wasteful number, since it uses less digits than its factorization.

20735998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9962.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 20735998 is about 4553.6796110398. The cubic root of 20735998 is about 274.7314093801.

The spelling of 20735998 in words is "twenty million, seven hundred thirty-five thousand, nine hundred ninety-eight".