21541030 has 32 divisors (see below), whose sum is σ = 45516096. Its totient is φ = 7185024.

The previous prime is 21541027. The next prime is 21541033. The reversal of 21541030 is 3014512.

It is an interprime number because it is at equal distance from previous prime (21541027) and next prime (21541033).

It is a junction number, because it is equal to n+sod(n) for n = 21540995 and 21541013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21541033) 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, 1569 + ... + 6748.

It is an arithmetic number, because the mean of its divisors is an integer number (1422378).

Almost surely, 2^21541030 is an apocalyptic number.

21541030 is an abundant number, since it is smaller than the sum of its proper divisors (23975066).

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

21541030 is a wasteful number, since it uses less digits than its factorization.

21541030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8368.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 21541030 is about 4641.2315176039. The cubic root of 21541030 is about 278.2416596828.

Adding to 21541030 its reverse (3014512), we get a palindrome (24555542).

The spelling of 21541030 in words is "twenty-one million, five hundred forty-one thousand, thirty".