20461455 has 48 divisors (see below), whose sum is σ = 42928704. Its totient is φ = 8801280.

The previous prime is 20461453. The next prime is 20461459. The reversal of 20461455 is 55416402.

20461455 is a `hidden beast` number, since 204 + 6 + 1 + 455 = 666.

It is not a de Polignac number, because 20461455 - 2¹ = 20461453 is a prime.

It is a super-2 number, since 2×20461455² = 837342281434050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20461451) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3445 + ... + 7265.

It is an arithmetic number, because the mean of its divisors is an integer number (894348).

Almost surely, 2^20461455 is an apocalyptic number.

20461455 is an abundant number, since it is smaller than the sum of its proper divisors (22467249).

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

20461455 is a wasteful number, since it uses less digits than its factorization.

20461455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3856 (or 3853 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 20461455 is about 4523.4339831593. The cubic root of 20461455 is about 273.5135444877.

Adding to 20461455 its reverse (55416402), we get a palindrome (75877857).

The spelling of 20461455 in words is "twenty million, four hundred sixty-one thousand, four hundred fifty-five".