21432102 has 32 divisors (see below), whose sum is σ = 45554400. Its totient is φ = 6709248.

The previous prime is 21432097. The next prime is 21432107. The reversal of 21432102 is 20123412.

It is an interprime number because it is at equal distance from previous prime (21432097) and next prime (21432107).

It is a super-2 number, since 2×21432102² = 918669992276808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21432107) 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 15 ways as a sum of consecutive naturals, for example, 4774 + ... + 8102.

It is an arithmetic number, because the mean of its divisors is an integer number (1423575).

Almost surely, 2^21432102 is an apocalyptic number.

21432102 is an abundant number, since it is smaller than the sum of its proper divisors (24122298).

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

21432102 is a wasteful number, since it uses less digits than its factorization.

21432102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3400.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 21432102 is about 4629.4818284555. The cubic root of 21432102 is about 277.7718656994.

Adding to 21432102 its reverse (20123412), we get a palindrome (41555514).

The spelling of 21432102 in words is "twenty-one million, four hundred thirty-two thousand, one hundred two".