20864154 has 8 divisors (see below), whose sum is σ = 41728320. Its totient is φ = 6954716.

The previous prime is 20864153. The next prime is 20864161. The reversal of 20864154 is 45146802.

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

20864154 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20864153) 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, 1738674 + ... + 1738685.

It is an arithmetic number, because the mean of its divisors is an integer number (5216040).

Almost surely, 2^20864154 is an apocalyptic number.

20864154 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20864154 is a wasteful number, since it uses less digits than its factorization.

20864154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3477364.

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 20864154 is about 4567.7296329796. The cubic root of 20864154 is about 275.2962273487.

The spelling of 20864154 in words is "twenty million, eight hundred sixty-four thousand, one hundred fifty-four".