20280620366 has 4 divisors (see below), whose sum is σ = 30420930552. Its totient is φ = 10140310182.

The previous prime is 20280620317. The next prime is 20280620383. The reversal of 20280620366 is 66302608202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×20280620366² (a number of 21 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 as a sum of consecutive naturals, namely, 5070155090 + ... + 5070155093.

It is an arithmetic number, because the mean of its divisors is an integer number (7605232638).

Almost surely, 2^20280620366 is an apocalyptic number.

20280620366 is a deficient number, since it is larger than the sum of its proper divisors (10140310186).

20280620366 is a wasteful number, since it uses less digits than its factorization.

20280620366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10140310185.

The product of its (nonzero) digits is 41472, while the sum is 35.

The spelling of 20280620366 in words is "twenty billion, two hundred eighty million, six hundred twenty thousand, three hundred sixty-six".