20602779004 has 6 divisors (see below), whose sum is σ = 36054863264. Its totient is φ = 10301389500.

The previous prime is 20602778993. The next prime is 20602779037. The reversal of 20602779004 is 40097720602.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2575347372 + ... + 2575347379.

Almost surely, 2^20602779004 is an apocalyptic number.

It is an amenable number.

20602779004 is a deficient number, since it is larger than the sum of its proper divisors (15452084260).

20602779004 is a wasteful number, since it uses less digits than its factorization.

20602779004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5150694755 (or 5150694753 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 37.

The spelling of 20602779004 in words is "twenty billion, six hundred two million, seven hundred seventy-nine thousand, four".