46218021 has 8 divisors (see below), whose sum is σ = 61823424. Its totient is φ = 30712320.

The previous prime is 46218001. The next prime is 46218041. The reversal of 46218021 is 12081264.

It is an interprime number because it is at equal distance from previous prime (46218001) and next prime (46218041).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 46218021 - 2⁶ = 46217957 is a prime.

It is a super-2 number, since 2×46218021² = 4272210930312882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 46217982 and 46218000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (46218001) 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, 23836 + ... + 25701.

It is an arithmetic number, because the mean of its divisors is an integer number (7727928).

Almost surely, 2^46218021 is an apocalyptic number.

It is an amenable number.

46218021 is a deficient number, since it is larger than the sum of its proper divisors (15605403).

46218021 is a wasteful number, since it uses less digits than its factorization.

46218021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49851.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 46218021 is about 6798.3837049699. The cubic root of 46218021 is about 358.8699673646.

Adding to 46218021 its reverse (12081264), we get a palindrome (58299285).

The spelling of 46218021 in words is "forty-six million, two hundred eighteen thousand, twenty-one".