21413754 has 32 divisors (see below), whose sum is σ = 47802240. Its totient is φ = 7105536.

The previous prime is 21413753. The next prime is 21413773. The reversal of 21413754 is 45731412.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (21413753) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13107 + ... + 14649.

It is an arithmetic number, because the mean of its divisors is an integer number (1493820).

Almost surely, 2^21413754 is an apocalyptic number.

21413754 is an abundant number, since it is smaller than the sum of its proper divisors (26388486).

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

21413754 is a wasteful number, since it uses less digits than its factorization.

21413754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1811 (or 1805 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 21413754 is about 4627.4997568882. The cubic root of 21413754 is about 277.6925763344.

The spelling of 21413754 in words is "twenty-one million, four hundred thirteen thousand, seven hundred fifty-four".