19970154 has 48 divisors (see below), whose sum is σ = 45508320. Its totient is φ = 6320160.

The previous prime is 19970149. The next prime is 19970177. The reversal of 19970154 is 45107991.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34689 + ... + 35259.

It is an arithmetic number, because the mean of its divisors is an integer number (948090).

Almost surely, 2^19970154 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19970154, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22754160).

19970154 is an abundant number, since it is smaller than the sum of its proper divisors (25538166).

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

19970154 is a wasteful number, since it uses less digits than its factorization.

19970154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675 (or 672 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 19970154 is about 4468.7978249189. The cubic root of 19970154 is about 271.3066702579.

The spelling of 19970154 in words is "nineteen million, nine hundred seventy thousand, one hundred fifty-four".