20548385311215 has 8 divisors (see below), whose sum is σ = 32877416497968. Its totient is φ = 10959138832640.

The previous prime is 20548385311211. The next prime is 20548385311229. The reversal of 20548385311215 is 51211358384502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20548385311215 - 2² = 20548385311211 is a prime.

It is a super-2 number, since 2×20548385311215² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20548385311211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 684946177026 + ... + 684946177055.

It is an arithmetic number, because the mean of its divisors is an integer number (4109677062246).

Almost surely, 2^{20548385311215} is an apocalyptic number.

20548385311215 is a deficient number, since it is larger than the sum of its proper divisors (12329031186753).

20548385311215 is a wasteful number, since it uses less digits than its factorization.

20548385311215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369892354089.

The product of its (nonzero) digits is 1152000, while the sum is 48.

The spelling of 20548385311215 in words is "twenty trillion, five hundred forty-eight billion, three hundred eighty-five million, three hundred eleven thousand, two hundred fifteen".