29654021990 has 32 divisors (see below), whose sum is σ = 53599933440. Its totient is φ = 11812176864.

The previous prime is 29654021953. The next prime is 29654022001. The reversal of 29654021990 is 9912045692.

It is a happy number.

It is a super-2 number, since 2×29654021990² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 7183307 + ... + 7187433.

It is an arithmetic number, because the mean of its divisors is an integer number (1674997920).

Almost surely, 2^29654021990 is an apocalyptic number.

29654021990 is a deficient number, since it is larger than the sum of its proper divisors (23945911450).

29654021990 is a wasteful number, since it uses less digits than its factorization.

29654021990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6956.

The product of its (nonzero) digits is 349920, while the sum is 47.

The spelling of 29654021990 in words is "twenty-nine billion, six hundred fifty-four million, twenty-one thousand, nine hundred ninety".