20821481546800 has 60 divisors (see below), whose sum is σ = 54571210283736. Its totient is φ = 7571447833600.

The previous prime is 20821481546783. The next prime is 20821481546813. The reversal of 20821481546800 is 864518412802.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2366073049 + ... + 2366081848.

Almost surely, 2^{20821481546800} is an apocalyptic number.

20821481546800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20821481546800 is an abundant number, since it is smaller than the sum of its proper divisors (33749728736936).

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

20821481546800 is a wasteful number, since it uses less digits than its factorization.

20821481546800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4732154926 (or 4732154915 counting only the distinct ones).

The product of its (nonzero) digits is 983040, while the sum is 49.

The spelling of 20821481546800 in words is "twenty trillion, eight hundred twenty-one billion, four hundred eighty-one million, five hundred forty-six thousand, eight hundred".