20420753562 has 32 divisors (see below), whose sum is σ = 49504858560. Its totient is φ = 6188106960.

The previous prime is 20420753543. The next prime is 20420753599. The reversal of 20420753562 is 26535702402.

20420753562 is a `hidden beast` number, since 2 + 0 + 4 + 20 + 75 + 3 + 562 = 666.

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 in 15 ways as a sum of consecutive naturals, for example, 17188593 + ... + 17189780.

It is an arithmetic number, because the mean of its divisors is an integer number (1547026830).

Almost surely, 2^20420753562 is an apocalyptic number.

20420753562 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20420753562 is an abundant number, since it is smaller than the sum of its proper divisors (29084104998).

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

20420753562 is a wasteful number, since it uses less digits than its factorization.

20420753562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34378395 (or 34378389 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 36.

The spelling of 20420753562 in words is "twenty billion, four hundred twenty million, seven hundred fifty-three thousand, five hundred sixty-two".