20471292 has 36 divisors (see below), whose sum is σ = 53665976. Its totient is φ = 6823440.

The previous prime is 20471291. The next prime is 20471327. The reversal of 20471292 is 29217402.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×20471292² = 838147592298528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20471291) 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, 9559 + ... + 11502.

Almost surely, 2^20471292 is an apocalyptic number.

It is an amenable number.

20471292 is an abundant number, since it is smaller than the sum of its proper divisors (33194684).

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

20471292 is a wasteful number, since it uses less digits than its factorization.

20471292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21080 (or 21066 counting only the distinct ones).

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

The square root of 20471292 is about 4524.5211901371. The cubic root of 20471292 is about 273.5573687040.

Adding to 20471292 its reverse (29217402), we get a palindrome (49688694).

The spelling of 20471292 in words is "twenty million, four hundred seventy-one thousand, two hundred ninety-two".