20575742 has 8 divisors (see below), whose sum is σ = 33669432. Its totient is φ = 9352600.

The previous prime is 20575741. The next prime is 20575747. The reversal of 20575742 is 24757502.

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

It is a super-2 number, since 2×20575742² = 846722317701128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20575699 and 20575708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20575741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 467609 + ... + 467652.

It is an arithmetic number, because the mean of its divisors is an integer number (4208679).

Almost surely, 2^20575742 is an apocalyptic number.

20575742 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20575742 is a deficient number, since it is larger than the sum of its proper divisors (13093690).

20575742 is a wasteful number, since it uses less digits than its factorization.

20575742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935274.

The product of its (nonzero) digits is 19600, while the sum is 32.

The square root of 20575742 is about 4536.0491619911. The cubic root of 20575742 is about 274.0218339111.

The spelling of 20575742 in words is "twenty million, five hundred seventy-five thousand, seven hundred forty-two".