21041154 has 16 divisors (see below), whose sum is σ = 46758240. Its totient is φ = 7013700.

The previous prime is 21041117. The next prime is 21041191. The reversal of 21041154 is 45114012.

It is an interprime number because it is at equal distance from previous prime (21041117) and next prime (21041191).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194772 + ... + 194879.

It is an arithmetic number, because the mean of its divisors is an integer number (2922390).

Almost surely, 2^21041154 is an apocalyptic number.

21041154 is an abundant number, since it is smaller than the sum of its proper divisors (25717086).

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

21041154 is a wasteful number, since it uses less digits than its factorization.

21041154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389662 (or 389656 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 21041154 is about 4587.0637667249. The cubic root of 21041154 is about 276.0725234747.

Adding to 21041154 its reverse (45114012), we get a palindrome (66155166).

The spelling of 21041154 in words is "twenty-one million, forty-one thousand, one hundred fifty-four".