21401030 has 32 divisors (see below), whose sum is σ = 46344960. Its totient is φ = 6950880.

The previous prime is 21400997. The next prime is 21401047. The reversal of 21401030 is 3010412.

It is a happy number.

It is a congruent 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, 6716 + ... + 9375.

It is an arithmetic number, because the mean of its divisors is an integer number (1448280).

Almost surely, 2^21401030 is an apocalyptic number.

21401030 is an abundant number, since it is smaller than the sum of its proper divisors (24943930).

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

21401030 is a wasteful number, since it uses less digits than its factorization.

21401030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16124.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 21401030 is about 4626.1247281067. The cubic root of 21401030 is about 277.6375640215.

Adding to 21401030 its reverse (3010412), we get a palindrome (24411442).

The spelling of 21401030 in words is "twenty-one million, four hundred one thousand, thirty".