20918333954 has 16 divisors (see below), whose sum is σ = 35878223808. Its totient is φ = 8960444592.

The previous prime is 20918333941. The next prime is 20918333971. The reversal of 20918333954 is 45933381902.

It is a super-2 number, since 2×20918333954² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20918333899 and 20918333908.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 351032 + ... + 406275.

It is an arithmetic number, because the mean of its divisors is an integer number (2242388988).

Almost surely, 2^20918333954 is an apocalyptic number.

20918333954 is a deficient number, since it is larger than the sum of its proper divisors (14959889854).

20918333954 is a wasteful number, since it uses less digits than its factorization.

20918333954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759289.

The product of its (nonzero) digits is 699840, while the sum is 47.

The spelling of 20918333954 in words is "twenty billion, nine hundred eighteen million, three hundred thirty-three thousand, nine hundred fifty-four".