20476988 has 36 divisors (see below), whose sum is σ = 42373296. Its totient is φ = 8481600.

The previous prime is 20476933. The next prime is 20477053. The reversal of 20476988 is 88967402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26528 + ... + 27288.

It is an arithmetic number, because the mean of its divisors is an integer number (1177036).

Almost surely, 2^20476988 is an apocalyptic number.

20476988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20476988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21186648).

20476988 is an abundant number, since it is smaller than the sum of its proper divisors (21896308).

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

20476988 is a wasteful number, since it uses less digits than its factorization.

20476988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834 (or 801 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 20476988 is about 4525.1506052285. The cubic root of 20476988 is about 273.5827381869.

The spelling of 20476988 in words is "twenty million, four hundred seventy-six thousand, nine hundred eighty-eight".