20454529 has 2 divisors, whose sum is σ = 20454530. Its totient is φ = 20454528.

The previous prime is 20454523. The next prime is 20454547. The reversal of 20454529 is 92545402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19184400 + 1270129 = 4380^2 + 1127^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20454529 is a prime.

It is a super-2 number, since 2×20454529² = 836775513223682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20454529.

It is not a weakly prime, because it can be changed into another prime (20454523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10227264 + 10227265.

It is an arithmetic number, because the mean of its divisors is an integer number (10227265).

Almost surely, 2^20454529 is an apocalyptic number.

It is an amenable number.

20454529 is a deficient number, since it is larger than the sum of its proper divisors (1).

20454529 is an equidigital number, since it uses as much as digits as its factorization.

20454529 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 20454529 is about 4522.6683495476. The cubic root of 20454529 is about 273.4826804625.

The spelling of 20454529 in words is "twenty million, four hundred fifty-four thousand, five hundred twenty-nine".