21475054 has 16 divisors (see below), whose sum is σ = 35383680. Its totient is φ = 9729720.

The previous prime is 21475043. The next prime is 21475057. The reversal of 21475054 is 45057412.

It is a super-2 number, since 2×21475054² = 922355888605832, which contains 22 as substring.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21475057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11412 + ... + 13159.

It is an arithmetic number, because the mean of its divisors is an integer number (2211480).

Almost surely, 2^21475054 is an apocalyptic number.

21475054 is a deficient number, since it is larger than the sum of its proper divisors (13908626).

21475054 is a wasteful number, since it uses less digits than its factorization.

21475054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24615.

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 21475054 is about 4634.1184706479. The cubic root of 21475054 is about 277.9573024154.

The spelling of 21475054 in words is "twenty-one million, four hundred seventy-five thousand, fifty-four".