20778002 has 8 divisors (see below), whose sum is σ = 35619456. Its totient is φ = 8904852.

The previous prime is 20777989. The next prime is 20778011. The reversal of 20778002 is 20087702.

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

It is a super-2 number, since 2×20778002² = 863450734224008, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 742058 + ... + 742085.

It is an arithmetic number, because the mean of its divisors is an integer number (4452432).

Almost surely, 2^20778002 is an apocalyptic number.

20778002 is a deficient number, since it is larger than the sum of its proper divisors (14841454).

20778002 is a wasteful number, since it uses less digits than its factorization.

20778002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1484152.

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 20778002 is about 4558.2893721220. The cubic root of 20778002 is about 274.9167880467.

The spelling of 20778002 in words is "twenty million, seven hundred seventy-eight thousand, two".