20992468 has 48 divisors (see below), whose sum is σ = 45045504. Its totient is φ = 8363520.

The previous prime is 20992463. The next prime is 20992469. The reversal of 20992468 is 86429902.

It is a self number, because there is not a number n which added to its sum of digits gives 20992468.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20992463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23388 + ... + 24268.

It is an arithmetic number, because the mean of its divisors is an integer number (938448).

Almost surely, 2^20992468 is an apocalyptic number.

20992468 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 20992468, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22522752).

20992468 is an abundant number, since it is smaller than the sum of its proper divisors (24053036).

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

20992468 is a wasteful number, since it uses less digits than its factorization.

20992468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952 (or 950 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 20992468 is about 4581.7538126792. The cubic root of 20992468 is about 275.8594292226.

The spelling of 20992468 in words is "twenty million, nine hundred ninety-two thousand, four hundred sixty-eight".