20149974 has 24 divisors (see below), whose sum is σ = 47017152. Its totient is φ = 6199920.

The previous prime is 20149973. The next prime is 20150021. The reversal of 20149974 is 47994102.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20149973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42822 + ... + 43289.

It is an arithmetic number, because the mean of its divisors is an integer number (1959048).

Almost surely, 2^20149974 is an apocalyptic number.

20149974 is an abundant number, since it is smaller than the sum of its proper divisors (26867178).

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

20149974 is a wasteful number, since it uses less digits than its factorization.

20149974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86132 (or 86129 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 20149974 is about 4488.8722414433. The cubic root of 20149974 is about 272.1185595459.

The spelling of 20149974 in words is "twenty million, one hundred forty-nine thousand, nine hundred seventy-four".