20986060949664 has 48 divisors (see below), whose sum is σ = 55208953675008. Its totient is φ = 6980046515712.

The previous prime is 20986060949621. The next prime is 20986060949671. The reversal of 20986060949664 is 46694906068902.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

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, 239129872 + ... + 239217615.

It is an arithmetic number, because the mean of its divisors is an integer number (1150186534896).

Almost surely, 2^{20986060949664} is an apocalyptic number.

20986060949664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20986060949664 is an abundant number, since it is smaller than the sum of its proper divisors (34222892725344).

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

20986060949664 is a wasteful number, since it uses less digits than its factorization.

20986060949664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478347957 (or 478347949 counting only the distinct ones).

The product of its (nonzero) digits is 241864704, while the sum is 69.

The spelling of 20986060949664 in words is "twenty trillion, nine hundred eighty-six billion, sixty million, nine hundred forty-nine thousand, six hundred sixty-four".