20951424 has 96 divisors (see below), whose sum is σ = 64974000. Its totient is φ = 6441984.

The previous prime is 20951423. The next prime is 20951467. The reversal of 20951424 is 42415902.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20951423) 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, 14277 + ... + 15675.

Almost surely, 2^20951424 is an apocalyptic number.

20951424 is a gapful number since it is divisible by the number (24) 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 20951424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32487000).

20951424 is an abundant number, since it is smaller than the sum of its proper divisors (44022576).

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

20951424 is a wasteful number, since it uses less digits than its factorization.

20951424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432 (or 1417 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 20951424 is about 4577.2725503295. The cubic root of 20951424 is about 275.6795272132.

The spelling of 20951424 in words is "twenty million, nine hundred fifty-one thousand, four hundred twenty-four".