20457734 has 8 divisors (see below), whose sum is σ = 33476328. Its totient is φ = 9298960.

The previous prime is 20457733. The next prime is 20457751. The reversal of 20457734 is 43775402.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20457734.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20457733) 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, 464927 + ... + 464970.

It is an arithmetic number, because the mean of its divisors is an integer number (4184541).

Almost surely, 2^20457734 is an apocalyptic number.

20457734 is a deficient number, since it is larger than the sum of its proper divisors (13018594).

20457734 is a wasteful number, since it uses less digits than its factorization.

20457734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929910.

The product of its (nonzero) digits is 23520, while the sum is 32.

The square root of 20457734 is about 4523.0226618933. The cubic root of 20457734 is about 273.4969636271.

It can be divided in two parts, 2045 and 7734, that added together give a palindrome (9779).

The spelling of 20457734 in words is "twenty million, four hundred fifty-seven thousand, seven hundred thirty-four".