20769578 has 8 divisors (see below), whose sum is σ = 31285440. Its totient is φ = 10341100.

The previous prime is 20769577. The next prime is 20769589. The reversal of 20769578 is 87596702.

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

It is not an unprimeable number, because it can be changed into a prime (20769571) 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, 21248 + ... + 22203.

It is an arithmetic number, because the mean of its divisors is an integer number (3910680).

Almost surely, 2^20769578 is an apocalyptic number.

20769578 is a deficient number, since it is larger than the sum of its proper divisors (10515862).

20769578 is a wasteful number, since it uses less digits than its factorization.

20769578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43692.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 20769578 is about 4557.3652475965. The cubic root of 20769578 is about 274.8796299652.

The spelling of 20769578 in words is "twenty million, seven hundred sixty-nine thousand, five hundred seventy-eight".