20545010 has 24 divisors (see below), whose sum is σ = 39289860. Its totient is φ = 7733504.

The previous prime is 20545001. The next prime is 20545037. The reversal of 20545010 is 1054502.

It can be written as a sum of positive squares in 6 ways, for example, as 10804369 + 9740641 = 3287^2 + 3121^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 20545010.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 665 + ... + 6444.

Almost surely, 2^20545010 is an apocalyptic number.

20545010 is a deficient number, since it is larger than the sum of its proper divisors (18744850).

20545010 is a wasteful number, since it uses less digits than its factorization.

20545010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7150 (or 7133 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 20545010 is about 4532.6603667162. The cubic root of 20545010 is about 273.8853392767.

Adding to 20545010 its reverse (1054502), we get a palindrome (21599512).

The spelling of 20545010 in words is "twenty million, five hundred forty-five thousand, ten".