20462121 has 6 divisors (see below), whose sum is σ = 29556410. Its totient is φ = 13641408.

The previous prime is 20462093. The next prime is 20462137. The reversal of 20462121 is 12126402.

20462121 is a `hidden beast` number, since 20 + 4 + 621 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12960000 + 7502121 = 3600^2 + 2739^2 .

It is not a de Polignac number, because 20462121 - 2²³ = 12073513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20462094 and 20462103.

It is not an unprimeable number, because it can be changed into a prime (20462191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1136776 + ... + 1136793.

Almost surely, 2^20462121 is an apocalyptic number.

It is an amenable number.

20462121 is a deficient number, since it is larger than the sum of its proper divisors (9094289).

20462121 is a wasteful number, since it uses less digits than its factorization.

20462121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2273575 (or 2273572 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 20462121 is about 4523.5075991978. The cubic root of 20462121 is about 273.5165119868.

Adding to 20462121 its reverse (12126402), we get a palindrome (32588523).

The spelling of 20462121 in words is "twenty million, four hundred sixty-two thousand, one hundred twenty-one".