21142062 has 24 divisors (see below), whose sum is σ = 47286720. Its totient is φ = 6819840.

The previous prime is 21142061. The next prime is 21142087. The reversal of 21142062 is 26024112.

It is a super-2 number, since 2×21142062² = 893973571223688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21142061) 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 11 ways as a sum of consecutive naturals, for example, 18387 + ... + 19502.

It is an arithmetic number, because the mean of its divisors is an integer number (1970280).

Almost surely, 2^21142062 is an apocalyptic number.

21142062 is an abundant number, since it is smaller than the sum of its proper divisors (26144658).

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

21142062 is a wasteful number, since it uses less digits than its factorization.

21142062 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37928 (or 37925 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 21142062 is about 4598.0498039930. The cubic root of 21142062 is about 276.5131442902.

Adding to 21142062 its reverse (26024112), we get a palindrome (47166174).

The spelling of 21142062 in words is "twenty-one million, one hundred forty-two thousand, sixty-two".