20642582 has 8 divisors (see below), whose sum is σ = 31270752. Its totient is φ = 10219000.

The previous prime is 20642581. The next prime is 20642591. The reversal of 20642582 is 28524602.

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

It is a super-2 number, since 2×20642582² = 852232383253448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20642581) 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, 50894 + ... + 51297.

It is an arithmetic number, because the mean of its divisors is an integer number (3908844).

Almost surely, 2^20642582 is an apocalyptic number.

20642582 is a deficient number, since it is larger than the sum of its proper divisors (10628170).

20642582 is a wasteful number, since it uses less digits than its factorization.

20642582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102294.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 20642582 is about 4543.4108332837. The cubic root of 20642582 is about 274.3182318477.

The spelling of 20642582 in words is "twenty million, six hundred forty-two thousand, five hundred eighty-two".