20366522420 has 24 divisors (see below), whose sum is σ = 42780318504. Its totient is φ = 8144585856.

The previous prime is 20366522413. The next prime is 20366522467. The reversal of 20366522420 is 2422566302.

It can be written as a sum of positive squares in 4 ways, for example, as 5252770576 + 15113751844 = 72476^2 + 122938^2 .

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, 42539 + ... + 206258.

It is an arithmetic number, because the mean of its divisors is an integer number (1782513271).

Almost surely, 2^20366522420 is an apocalyptic number.

20366522420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20366522420 is an abundant number, since it is smaller than the sum of its proper divisors (22413796084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20366522420 is a wasteful number, since it uses less digits than its factorization.

20366522420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252899 (or 252897 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 32.

The spelling of 20366522420 in words is "twenty billion, three hundred sixty-six million, five hundred twenty-two thousand, four hundred twenty".