21542062 has 8 divisors (see below), whose sum is σ = 32922936. Its totient is φ = 10567752.

The previous prime is 21541979. The next prime is 21542063. The reversal of 21542062 is 26024512.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21542063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101508 + ... + 101719.

It is an arithmetic number, because the mean of its divisors is an integer number (4115367).

Almost surely, 2^21542062 is an apocalyptic number.

21542062 is a deficient number, since it is larger than the sum of its proper divisors (11380874).

21542062 is a wasteful number, since it uses less digits than its factorization.

21542062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203282.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 21542062 is about 4641.3426936610. The cubic root of 21542062 is about 278.2461029988.

Adding to 21542062 its reverse (26024512), we get a palindrome (47566574).

The spelling of 21542062 in words is "twenty-one million, five hundred forty-two thousand, sixty-two".