20326761 has 32 divisors (see below), whose sum is σ = 37067520. Its totient is φ = 10720512.

The previous prime is 20326759. The next prime is 20326769. The reversal of 20326761 is 16762302.

It is a happy number.

It is not a de Polignac number, because 20326761 - 2¹ = 20326759 is a prime.

It is a super-2 number, since 2×20326761² = 826354425502242, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (20326769) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1680 + ... + 6593.

It is an arithmetic number, because the mean of its divisors is an integer number (1158360).

Almost surely, 2^20326761 is an apocalyptic number.

20326761 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20326761 is a deficient number, since it is larger than the sum of its proper divisors (16740759).

20326761 is a wasteful number, since it uses less digits than its factorization.

20326761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8302 (or 8296 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 20326761 is about 4508.5209326341. The cubic root of 20326761 is about 272.9120595872.

The spelling of 20326761 in words is "twenty million, three hundred twenty-six thousand, seven hundred sixty-one".