21152054 has 32 divisors (see below), whose sum is σ = 41644800. Its totient is φ = 7806240.

The previous prime is 21152051. The next prime is 21152069. The reversal of 21152054 is 45025112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21152051) 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, 689 + ... + 6540.

It is an arithmetic number, because the mean of its divisors is an integer number (1301400).

Almost surely, 2^21152054 is an apocalyptic number.

21152054 is a deficient number, since it is larger than the sum of its proper divisors (20492746).

21152054 is a wasteful number, since it uses less digits than its factorization.

21152054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7268.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 21152054 is about 4599.1362232489. The cubic root of 21152054 is about 276.5566986069.

Adding to 21152054 its reverse (45025112), we get a palindrome (66177166).

The spelling of 21152054 in words is "twenty-one million, one hundred fifty-two thousand, fifty-four".