21711342 has 16 divisors (see below), whose sum is σ = 43650000. Its totient is φ = 7199232.

The previous prime is 21711331. The next prime is 21711419. The reversal of 21711342 is 24311712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8217 + ... + 10532.

It is an arithmetic number, because the mean of its divisors is an integer number (2728125).

Almost surely, 2^21711342 is an apocalyptic number.

21711342 is an abundant number, since it is smaller than the sum of its proper divisors (21938658).

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

21711342 is a wasteful number, since it uses less digits than its factorization.

21711342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18947.

The product of its digits is 336, while the sum is 21.

The square root of 21711342 is about 4659.5431106494. The cubic root of 21711342 is about 278.9730321694.

The spelling of 21711342 in words is "twenty-one million, seven hundred eleven thousand, three hundred forty-two".