20949193821220 has 36 divisors (see below), whose sum is σ = 51175887765660. Its totient is φ = 7182580738368.

The previous prime is 20949193821211. The next prime is 20949193821277. The reversal of 20949193821220 is 2212839194902.

It can be written as a sum of positive squares in 2 ways, for example, as 14923897017316 + 6025296803904 = 3863146^2 + 2454648^2 .

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, 10688363215 + ... + 10688365174.

It is an arithmetic number, because the mean of its divisors is an integer number (1421552437935).

Almost surely, 2^{20949193821220} is an apocalyptic number.

20949193821220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20949193821220 is an abundant number, since it is smaller than the sum of its proper divisors (30226693944440).

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

20949193821220 is a wasteful number, since it uses less digits than its factorization.

20949193821220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21376728412 (or 21376728403 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 52.

The spelling of 20949193821220 in words is "twenty trillion, nine hundred forty-nine billion, one hundred ninety-three million, eight hundred twenty-one thousand, two hundred twenty".