20149976 has 48 divisors (see below), whose sum is σ = 47955240. Its totient is φ = 7848960.

The previous prime is 20149973. The next prime is 20150021. The reversal of 20149976 is 67994102.

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, 1976 + ... + 6648.

Almost surely, 2^20149976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20149976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23977620).

20149976 is an abundant number, since it is smaller than the sum of its proper divisors (27805264).

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

20149976 is a wasteful number, since it uses less digits than its factorization.

20149976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4704 (or 4693 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 20149976 is about 4488.8724642164. The cubic root of 20149976 is about 272.1185685490.

The spelling of 20149976 in words is "twenty million, one hundred forty-nine thousand, nine hundred seventy-six".