20645001254 has 8 divisors (see below), whose sum is σ = 31152936528. Its totient is φ = 10260689080.

The previous prime is 20645001241. The next prime is 20645001281. The reversal of 20645001254 is 45210054602.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30905357 + ... + 30906024.

It is an arithmetic number, because the mean of its divisors is an integer number (3894117066).

Almost surely, 2^20645001254 is an apocalyptic number.

20645001254 is a deficient number, since it is larger than the sum of its proper divisors (10507935274).

20645001254 is a wasteful number, since it uses less digits than its factorization.

20645001254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61811550.

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 20645001254 its reverse (45210054602), we get a palindrome (65855055856).

The spelling of 20645001254 in words is "twenty billion, six hundred forty-five million, one thousand, two hundred fifty-four".