21540045514 has 32 divisors (see below), whose sum is σ = 38219287680. Its totient is φ = 9008822592.

The previous prime is 21540045463. The next prime is 21540045523. The reversal of 21540045514 is 41554004512.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 936537 + ... + 959260.

It is an arithmetic number, because the mean of its divisors is an integer number (1194352740).

Almost surely, 2^21540045514 is an apocalyptic number.

21540045514 is a deficient number, since it is larger than the sum of its proper divisors (16679242166).

21540045514 is a wasteful number, since it uses less digits than its factorization.

21540045514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1895854.

The product of its (nonzero) digits is 16000, while the sum is 31.

The spelling of 21540045514 in words is "twenty-one billion, five hundred forty million, forty-five thousand, five hundred fourteen".