21347754 has 32 divisors (see below), whose sum is σ = 45173760. Its totient is φ = 6706800.

The previous prime is 21347723. The next prime is 21347771. The reversal of 21347754 is 45774312.

It is a Curzon 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, 30549 + ... + 31239.

It is an arithmetic number, because the mean of its divisors is an integer number (1411680).

Almost surely, 2^21347754 is an apocalyptic number.

21347754 is an abundant number, since it is smaller than the sum of its proper divisors (23826006).

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

21347754 is a wasteful number, since it uses less digits than its factorization.

21347754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986.

The product of its digits is 23520, while the sum is 33.

The square root of 21347754 is about 4620.3629727544. The cubic root of 21347754 is about 277.4069877385.

It can be divided in two parts, 213477 and 54, that added together give a triangular number (213531 = T₆₅₃).

The spelling of 21347754 in words is "twenty-one million, three hundred forty-seven thousand, seven hundred fifty-four".