20954878880354 has 8 divisors (see below), whose sum is σ = 31679816890368. Its totient is φ = 10394939916900.

The previous prime is 20954878880321. The next prime is 20954878880387. The reversal of 20954878880354 is 45308887845902.

It is an interprime number because it is at equal distance from previous prime (20954878880321) and next prime (20954878880387).

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

It is a super-2 number, since 2×20954878880354² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41249761322 + ... + 41249761829.

It is an arithmetic number, because the mean of its divisors is an integer number (3959977111296).

Almost surely, 2^{20954878880354} is an apocalyptic number.

20954878880354 is a deficient number, since it is larger than the sum of its proper divisors (10724938010014).

20954878880354 is a wasteful number, since it uses less digits than its factorization.

20954878880354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82499523280.

The product of its (nonzero) digits is 619315200, while the sum is 71.

The spelling of 20954878880354 in words is "twenty trillion, nine hundred fifty-four billion, eight hundred seventy-eight million, eight hundred eighty thousand, three hundred fifty-four".