20878148133554 has 8 divisors (see below), whose sum is σ = 32965497053040. Its totient is φ = 9889649115876.

The previous prime is 20878148133553. The next prime is 20878148133581. The reversal of 20878148133554 is 45533184187802.

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

It is a junction number, because it is equal to n+sod(n) for n = 20878148133493 and 20878148133502.

It is not an unprimeable number, because it can be changed into a prime (20878148133551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274712475404 + ... + 274712475479.

It is an arithmetic number, because the mean of its divisors is an integer number (4120687131630).

Almost surely, 2^{20878148133554} is an apocalyptic number.

20878148133554 is a deficient number, since it is larger than the sum of its proper divisors (12087348919486).

20878148133554 is a wasteful number, since it uses less digits than its factorization.

20878148133554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549424950904.

The product of its (nonzero) digits is 25804800, while the sum is 59.

The spelling of 20878148133554 in words is "twenty trillion, eight hundred seventy-eight billion, one hundred forty-eight million, one hundred thirty-three thousand, five hundred fifty-four".