20751426 has 12 divisors (see below), whose sum is σ = 44961462. Its totient is φ = 6917136.

The previous prime is 20751403. The next prime is 20751457. The reversal of 20751426 is 62415702.

It can be written as a sum of positive squares in only one way, i.e., 19847025 + 904401 = 4455^2 + 951^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20751426.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 576411 + ... + 576446.

Almost surely, 2^20751426 is an apocalyptic number.

20751426 is an abundant number, since it is smaller than the sum of its proper divisors (24210036).

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

20751426 is a wasteful number, since it uses less digits than its factorization.

20751426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152865 (or 1152862 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 20751426 is about 4555.3733107178. The cubic root of 20751426 is about 274.7995277224.

The spelling of 20751426 in words is "twenty million, seven hundred fifty-one thousand, four hundred twenty-six".