20790434 has 8 divisors (see below), whose sum is σ = 35640768. Its totient is φ = 8910180.

The previous prime is 20790431. The next prime is 20790437. The reversal of 20790434 is 43409702.

It is an interprime number because it is at equal distance from previous prime (20790431) and next prime (20790437).

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

It is a junction number, because it is equal to n+sod(n) for n = 20790397 and 20790406.

It is not an unprimeable number, because it can be changed into a prime (20790431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 742502 + ... + 742529.

It is an arithmetic number, because the mean of its divisors is an integer number (4455096).

Almost surely, 2^20790434 is an apocalyptic number.

20790434 is a deficient number, since it is larger than the sum of its proper divisors (14850334).

20790434 is a wasteful number, since it uses less digits than its factorization.

20790434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1485040.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 20790434 is about 4559.6528376621. The cubic root of 20790434 is about 274.9716069860.

The spelling of 20790434 in words is "twenty million, seven hundred ninety thousand, four hundred thirty-four".