20944951 has 2 divisors, whose sum is σ = 20944952. Its totient is φ = 20944950.

The previous prime is 20944921. The next prime is 20944981. The reversal of 20944951 is 15944902.

It is a balanced prime because it is at equal distance from previous prime (20944921) and next prime (20944981).

It is a cyclic number.

It is not a de Polignac number, because 20944951 - 2¹³ = 20936759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20944921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10472475 + 10472476.

It is an arithmetic number, because the mean of its divisors is an integer number (10472476).

Almost surely, 2^20944951 is an apocalyptic number.

20944951 is a deficient number, since it is larger than the sum of its proper divisors (1).

20944951 is an equidigital number, since it uses as much as digits as its factorization.

20944951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 20944951 is about 4576.5654152432. The cubic root of 20944951 is about 275.6511336399.

The spelling of 20944951 in words is "twenty million, nine hundred forty-four thousand, nine hundred fifty-one".