20514945 has 48 divisors (see below), whose sum is σ = 36771840. Its totient is φ = 9757440.

The previous prime is 20514943. The next prime is 20514947. The reversal of 20514945 is 54941502.

It is an interprime number because it is at equal distance from previous prime (20514943) and next prime (20514947).

It is not a de Polignac number, because 20514945 - 2¹ = 20514943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20514941) 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, 161472 + ... + 161598.

It is an arithmetic number, because the mean of its divisors is an integer number (766080).

Almost surely, 2^20514945 is an apocalyptic number.

It is an amenable number.

20514945 is a deficient number, since it is larger than the sum of its proper divisors (16256895).

20514945 is a wasteful number, since it uses less digits than its factorization.

20514945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246 (or 235 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 20514945 is about 4529.3426675402. The cubic root of 20514945 is about 273.7516753093.

It can be divided in two parts, 2051 and 4945, that added together give a palindrome (6996).

The spelling of 20514945 in words is "twenty million, five hundred fourteen thousand, nine hundred forty-five".