20149470 has 48 divisors (see below), whose sum is σ = 57154032. Its totient is φ = 4884480.

The previous prime is 20149469. The next prime is 20149477. The reversal of 20149470 is 7494102.

It is a happy number.

It is a super-2 number, since 2×20149470² = 812002282561800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20149477) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9187 + ... + 11166.

It is an arithmetic number, because the mean of its divisors is an integer number (1190709).

Almost surely, 2^20149470 is an apocalyptic number.

20149470 is an abundant number, since it is smaller than the sum of its proper divisors (37004562).

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

20149470 is a wasteful number, since it uses less digits than its factorization.

20149470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20377 (or 20374 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 20149470 is about 4488.8161022702. The cubic root of 20149470 is about 272.1162907440.

The spelling of 20149470 in words is "twenty million, one hundred forty-nine thousand, four hundred seventy".