20545342 has 16 divisors (see below), whose sum is σ = 31298400. Its totient is φ = 10114048.

The previous prime is 20545331. The next prime is 20545363. The reversal of 20545342 is 24354502.

It is a super-2 number, since 2×20545342² = 844222155793928, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45534 + ... + 45982.

It is an arithmetic number, because the mean of its divisors is an integer number (1956150).

Almost surely, 2^20545342 is an apocalyptic number.

20545342 is a deficient number, since it is larger than the sum of its proper divisors (10753058).

20545342 is a wasteful number, since it uses less digits than its factorization.

20545342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 20545342 is about 4532.6969896520. The cubic root of 20545342 is about 273.8868145650.

Adding to 20545342 its reverse (24354502), we get a palindrome (44899844).

It can be divided in two parts, 2054 and 5342, that added together give a square (7396 = 86²).

The spelling of 20545342 in words is "twenty million, five hundred forty-five thousand, three hundred forty-two".