20488651 has 2 divisors, whose sum is σ = 20488652. Its totient is φ = 20488650.

The previous prime is 20488649. The next prime is 20488673. The reversal of 20488651 is 15688402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20488651 - 2¹ = 20488649 is a prime.

Together with 20488649, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20488751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10244325 + 10244326.

It is an arithmetic number, because the mean of its divisors is an integer number (10244326).

Almost surely, 2^20488651 is an apocalyptic number.

20488651 is a deficient number, since it is larger than the sum of its proper divisors (1).

20488651 is an equidigital number, since it uses as much as digits as its factorization.

20488651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 20488651 is about 4526.4391081732. The cubic root of 20488651 is about 273.6346694878.

The spelling of 20488651 in words is "twenty million, four hundred eighty-eight thousand, six hundred fifty-one".