21698152 has 32 divisors (see below), whose sum is σ = 48945600. Its totient is φ = 8809344.

The previous prime is 21698107. The next prime is 21698153. The reversal of 21698152 is 25189612.

It is not an unprimeable number, because it can be changed into a prime (21698153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9133 + ... + 11260.

It is an arithmetic number, because the mean of its divisors is an integer number (1529550).

Almost surely, 2^21698152 is an apocalyptic number.

It is an amenable number.

21698152 is an abundant number, since it is smaller than the sum of its proper divisors (27247448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21698152 is a wasteful number, since it uses less digits than its factorization.

21698152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20425 (or 20421 counting only the distinct ones).

The product of its digits is 8640, while the sum is 34.

The square root of 21698152 is about 4658.1275207963. The cubic root of 21698152 is about 278.9165271455.

The spelling of 21698152 in words is "twenty-one million, six hundred ninety-eight thousand, one hundred fifty-two".