20954377 has 2 divisors, whose sum is σ = 20954378. Its totient is φ = 20954376.

The previous prime is 20954371. The next prime is 20954399. The reversal of 20954377 is 77345902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10784656 + 10169721 = 3284^2 + 3189^2 .

It is a cyclic number.

It is not a de Polignac number, because 20954377 - 2²³ = 12565769 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20954371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10477188 + 10477189.

It is an arithmetic number, because the mean of its divisors is an integer number (10477189).

Almost surely, 2^20954377 is an apocalyptic number.

It is an amenable number.

20954377 is a deficient number, since it is larger than the sum of its proper divisors (1).

20954377 is an equidigital number, since it uses as much as digits as its factorization.

20954377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 20954377 is about 4577.5951109726. The cubic root of 20954377 is about 275.6924784952.

The spelling of 20954377 in words is "twenty million, nine hundred fifty-four thousand, three hundred seventy-seven".