20653450 has 12 divisors (see below), whose sum is σ = 38415510. Its totient is φ = 8261360.

The previous prime is 20653447. The next prime is 20653469. The reversal of 20653450 is 5435602.

It can be written as a sum of positive squares in 3 ways, for example, as 13184161 + 7469289 = 3631^2 + 2733^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 206485 + ... + 206584.

Almost surely, 2^20653450 is an apocalyptic number.

20653450 is a deficient number, since it is larger than the sum of its proper divisors (17762060).

20653450 is a wasteful number, since it uses less digits than its factorization.

20653450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413081 (or 413076 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 20653450 is about 4544.6066936535. The cubic root of 20653450 is about 274.3663648363.

The spelling of 20653450 in words is "twenty million, six hundred fifty-three thousand, four hundred fifty".