20796972 has 72 divisors (see below), whose sum is σ = 57130416. Its totient is φ = 5870592.

The previous prime is 20796959. The next prime is 20797013. The reversal of 20796972 is 27969702.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66288 + ... + 66600.

It is an arithmetic number, because the mean of its divisors is an integer number (793478).

Almost surely, 2^20796972 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 20796972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28565208).

20796972 is an abundant number, since it is smaller than the sum of its proper divisors (36333444).

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

20796972 is a wasteful number, since it uses less digits than its factorization.

20796972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447 (or 438 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 42.

The square root of 20796972 is about 4560.3697218537. The cubic root of 20796972 is about 275.0004275475. Note that the first 3 decimals are identical.

It can be divided in two parts, 207 and 96972, that added together give a palindrome (97179).

The spelling of 20796972 in words is "twenty million, seven hundred ninety-six thousand, nine hundred seventy-two".