20348145 has 32 divisors (see below), whose sum is σ = 38083200. Its totient is φ = 10279872.

The previous prime is 20348137. The next prime is 20348147. The reversal of 20348145 is 54184302.

It is not a de Polignac number, because 20348145 - 2³ = 20348137 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20348147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1402 + ... + 6531.

It is an arithmetic number, because the mean of its divisors is an integer number (1190100).

Almost surely, 2^20348145 is an apocalyptic number.

It is an amenable number.

20348145 is a deficient number, since it is larger than the sum of its proper divisors (17735055).

20348145 is a wasteful number, since it uses less digits than its factorization.

20348145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7966 (or 7960 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 20348145 is about 4510.8918186984. The cubic root of 20348145 is about 273.0077283164.

The spelling of 20348145 in words is "twenty million, three hundred forty-eight thousand, one hundred forty-five".