21162054 has 16 divisors (see below), whose sum is σ = 43783920. Its totient is φ = 6810720.

The previous prime is 21162041. The next prime is 21162107. The reversal of 21162054 is 45026112.

It is a self number, because there is not a number n which added to its sum of digits gives 21162054.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60637 + ... + 60984.

It is an arithmetic number, because the mean of its divisors is an integer number (2736495).

Almost surely, 2^21162054 is an apocalyptic number.

21162054 is an abundant number, since it is smaller than the sum of its proper divisors (22621866).

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

21162054 is a wasteful number, since it uses less digits than its factorization.

21162054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121655.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 21162054 is about 4600.2232554518. The cubic root of 21162054 is about 276.6002740641.

Adding to 21162054 its reverse (45026112), we get a palindrome (66188166).

The spelling of 21162054 in words is "twenty-one million, one hundred sixty-two thousand, fifty-four".