20645000354 has 32 divisors (see below), whose sum is σ = 36428132160. Its totient is φ = 8673350400.

The previous prime is 20645000347. The next prime is 20645000381. The reversal of 20645000354 is 45300054602.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 585179 + ... + 619454.

It is an arithmetic number, because the mean of its divisors is an integer number (1138379130).

Almost surely, 2^20645000354 is an apocalyptic number.

20645000354 is a deficient number, since it is larger than the sum of its proper divisors (15783131806).

20645000354 is a wasteful number, since it uses less digits than its factorization.

20645000354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1204706.

The product of its (nonzero) digits is 14400, while the sum is 29.

Adding to 20645000354 its reverse (45300054602), we get a palindrome (65945054956).

The spelling of 20645000354 in words is "twenty billion, six hundred forty-five million, three hundred fifty-four", and thus it is an aban number.