21341542 has 4 divisors (see below), whose sum is σ = 32012316. Its totient is φ = 10670770.

The previous prime is 21341533. The next prime is 21341543. The reversal of 21341542 is 24514312.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×21341542² = 910922829875528, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21341543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5335384 + ... + 5335387.

It is an arithmetic number, because the mean of its divisors is an integer number (8003079).

Almost surely, 2^21341542 is an apocalyptic number.

21341542 is a deficient number, since it is larger than the sum of its proper divisors (10670774).

21341542 is a wasteful number, since it uses less digits than its factorization.

21341542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10670773.

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

The square root of 21341542 is about 4619.6906822860. The cubic root of 21341542 is about 277.3800775011.

Adding to 21341542 its reverse (24514312), we get a palindrome (45855854).

The spelling of 21341542 in words is "twenty-one million, three hundred forty-one thousand, five hundred forty-two".