20552451 has 8 divisors (see below), whose sum is σ = 27812544. Its totient is φ = 13497000.

The previous prime is 20552449. The next prime is 20552479. The reversal of 20552451 is 15425502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20552451 - 2¹ = 20552449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20552491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50925 + ... + 51326.

It is an arithmetic number, because the mean of its divisors is an integer number (3476568).

Almost surely, 2^20552451 is an apocalyptic number.

20552451 is a deficient number, since it is larger than the sum of its proper divisors (7260093).

20552451 is a wasteful number, since it uses less digits than its factorization.

20552451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102321.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 20552451 is about 4533.4811127874. The cubic root of 20552451 is about 273.9184005865.

Adding to 20552451 its reverse (15425502), we get a palindrome (35977953).

The spelling of 20552451 in words is "twenty million, five hundred fifty-two thousand, four hundred fifty-one".