20742554 has 8 divisors (see below), whose sum is σ = 35558688. Its totient is φ = 8889660.

The previous prime is 20742551. The next prime is 20742563. The reversal of 20742554 is 45524702.

It is a happy number.

20742554 is nontrivially palindromic in base 6.

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

It is not an unprimeable number, because it can be changed into a prime (20742551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 740792 + ... + 740819.

It is an arithmetic number, because the mean of its divisors is an integer number (4444836).

Almost surely, 2^20742554 is an apocalyptic number.

20742554 is a deficient number, since it is larger than the sum of its proper divisors (14816134).

20742554 is a wasteful number, since it uses less digits than its factorization.

20742554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1481620.

The product of its (nonzero) digits is 11200, while the sum is 29.

The square root of 20742554 is about 4554.3994115580. The cubic root of 20742554 is about 274.7603598287.

The spelling of 20742554 in words is "twenty million, seven hundred forty-two thousand, five hundred fifty-four".