21542962 has 16 divisors (see below), whose sum is σ = 37452672. Its totient is φ = 9102240.

The previous prime is 21542959. The next prime is 21542977. The reversal of 21542962 is 26924512.

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, 9843 + ... + 11830.

It is an arithmetic number, because the mean of its divisors is an integer number (2340792).

Almost surely, 2^21542962 is an apocalyptic number.

21542962 is a deficient number, since it is larger than the sum of its proper divisors (15909710).

21542962 is a wasteful number, since it uses less digits than its factorization.

21542962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21753.

The product of its digits is 8640, while the sum is 31.

The square root of 21542962 is about 4641.4396473508. The cubic root of 21542962 is about 278.2499778678.

The spelling of 21542962 in words is "twenty-one million, five hundred forty-two thousand, nine hundred sixty-two".