20513466 has 32 divisors (see below), whose sum is σ = 46822080. Its totient is φ = 6652368.

The previous prime is 20513461. The next prime is 20513513. The reversal of 20513466 is 66431502.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20513461) 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 15 ways as a sum of consecutive naturals, for example, 3136 + ... + 7131.

It is an arithmetic number, because the mean of its divisors is an integer number (1463190).

Almost surely, 2^20513466 is an apocalyptic number.

20513466 is an abundant number, since it is smaller than the sum of its proper divisors (26308614).

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

20513466 is a wasteful number, since it uses less digits than its factorization.

20513466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10315 (or 10309 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 20513466 is about 4529.1793958729. The cubic root of 20513466 is about 273.7450965532.

Adding to 20513466 its reverse (66431502), we get a palindrome (86944968).

The spelling of 20513466 in words is "twenty million, five hundred thirteen thousand, four hundred sixty-six".