21032198 has 16 divisors (see below), whose sum is σ = 35527680. Its totient is φ = 9251400.

The previous prime is 21032197. The next prime is 21032201. The reversal of 21032198 is 89123012.

It is a super-2 number, since 2×21032198² = 884706705422408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21032197) 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, 14738 + ... + 16101.

It is an arithmetic number, because the mean of its divisors is an integer number (2220480).

Almost surely, 2^21032198 is an apocalyptic number.

21032198 is a deficient number, since it is larger than the sum of its proper divisors (14495482).

21032198 is a wasteful number, since it uses less digits than its factorization.

21032198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30883.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 21032198 is about 4586.0874392013. The cubic root of 21032198 is about 276.0333485574.

The spelling of 21032198 in words is "twenty-one million, thirty-two thousand, one hundred ninety-eight".