20261967 has 8 divisors (see below), whose sum is σ = 29472000. Its totient is φ = 12279960.

The previous prime is 20261959. The next prime is 20261971. The reversal of 20261967 is 76916202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20261967 - 2³ = 20261959 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 613999 = 20261967 / (2 + 0 + 2 + 6 + 1 + 9 + 6 + 7).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20261947) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 306967 + ... + 307032.

It is an arithmetic number, because the mean of its divisors is an integer number (3684000).

Almost surely, 2^20261967 is an apocalyptic number.

20261967 is a deficient number, since it is larger than the sum of its proper divisors (9210033).

20261967 is a wasteful number, since it uses less digits than its factorization.

20261967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614013.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 20261967 is about 4501.3294702788. The cubic root of 20261967 is about 272.6217709000.

It can be divided in two parts, 2026 and 1967, that added together give a palindrome (3993).

The spelling of 20261967 in words is "twenty million, two hundred sixty-one thousand, nine hundred sixty-seven".