20277776858428 has 24 divisors (see below), whose sum is σ = 35521699217760. Its totient is φ = 10128720591360.

The previous prime is 20277776858401. The next prime is 20277776858431. The reversal of 20277776858428 is 82485867777202.

It is a super-2 number, since 2×20277776858428² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166684888 + ... + 166806496.

It is an arithmetic number, because the mean of its divisors is an integer number (1480070800740).

Almost surely, 2^{20277776858428} is an apocalyptic number.

It is an amenable number.

20277776858428 is a deficient number, since it is larger than the sum of its proper divisors (15243922359332).

20277776858428 is a wasteful number, since it uses less digits than its factorization.

20277776858428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163077 (or 163075 counting only the distinct ones).

The product of its (nonzero) digits is 1180139520, while the sum is 73.

The spelling of 20277776858428 in words is "twenty trillion, two hundred seventy-seven billion, seven hundred seventy-six million, eight hundred fifty-eight thousand, four hundred twenty-eight".