20954647093 has 8 divisors (see below), whose sum is σ = 21088789400. Its totient is φ = 20820768768.

The previous prime is 20954647079. The next prime is 20954647127. The reversal of 20954647093 is 39074645902.

It can be written as a sum of positive squares in 4 ways, for example, as 6401120049 + 14553527044 = 80007^2 + 120638^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20954647093 - 2¹⁷ = 20954516021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20954647193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94513 + ... + 225481.

It is an arithmetic number, because the mean of its divisors is an integer number (2636098675).

Almost surely, 2^20954647093 is an apocalyptic number.

It is an amenable number.

20954647093 is a deficient number, since it is larger than the sum of its proper divisors (134142307).

20954647093 is a wasteful number, since it uses less digits than its factorization.

20954647093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131991.

The product of its (nonzero) digits is 1632960, while the sum is 49.

The spelling of 20954647093 in words is "twenty billion, nine hundred fifty-four million, six hundred forty-seven thousand, ninety-three".